We could join forces see my Today's news posts. I can post in the morning ( GMT +4).

Awesome!

Pi's are really only good for mining if the device actually doing the mining is connected in over USB. I know I've seen setups of BFL Jalapenos and a Pi. I don't know if an FPGA can be hosted on a PI, but if a Jalapeno could be, shouldn't be any reason why an FPGA would have issues.

But the above, those are for SHA256 coins. Add in also USB Block Eruptors to that mix.

As to Scrypt coins (such as LTC and the many others that are looked upon with scorn by many on this board outside "Alternative Cryptocurrency"), you need to mine those with either a CPU or GPU. A Pi's CPU is VERY minimal, to the point that its probably not worthwhile. A Pi can't support the large amounts of RAM that a Scrypt system needs (4GB+, 8GB for anything really worthwhile), and does not have the PCIe bus or ports to host a PCIe GPU.

As to Scrypt-Jane style coins, the ones engineered to only be solved by CPU and not GPU... Pi can't do these either.

As was said above me, there are sites that say parts. I suggest you maybe look here on this site at TacoTime's crate build for a suggestion. As to video cards, do research in this forum you posted in, and also at the Litecoin Mining Hardware Comparison. Most of the time, the answer of which video card will be very similar regardless of SHA256 or Scrypt.

To answer your question as to if you need parts (without suggesting to you exact parts)... you DO need the following parts, and you need them for EACH rig. They're a full computer:

-Something to hold all your components, but which still provides an adequate air supply to the base of the cards (unless you are using a liquid cooling system). A typical computer case would seem the logical answer... but its often NOT the best answer in this particular case. Again, look at the crate build.

Core components:
-Motherboard
-CPU (and its cooler that usually comes with it)
-RAM
-Power Supply (adequately sized to your needs... don't skimp!)
-Storage (Some people say hard drive... some say USB drive. I personally do hard drives because they are also usable in other situations after I finish mining (Drobo, for instance), and to me a USB drive will take a little longer to boot from. Don't try to leap ahead by getting an SSD... that's a little overkill in this scenario.) PS: I've heard Linux mining systems won't run from USB... doesn't make sense to me, but thats what a few on the forum have said.

Hashing Power/accessories
-GPU - You have LOTS of choices... and the biggest hint is choose AMD, not Nvidia. Do your research very well before choosing. Keep in mind some cards have voltage locks on them, and may not be able to be as easily adjusted as others.
-Accessories - If at all possible, you want to try NOT to jam the cards up next to each other, so not plugging direct into the ports available on the motherboard. If you choose an alternative case like a milk/storage crate, you probably need to get riser cables (1-16, or 16-16)... and you probably also need to get something to attach the card to the crate (screws) and something to support the end of the card that's hovering in the middle of the case (I use a wooden paint stirrer stick.)

-Cooling System: Unless you're using a liquid cooling system to transfer the heat outside the box then dissipate a distance away (which is also a bit overkill), you'll be wanting fans. Not just fans to blow over your rigs to provide fresh air to the bottom of the cards and move hot air away from the top of the cards... but also something to ventilate the heat out of the top of the room to a location the heat is NOT... the rest of the house, a window, etc. Your room has a given amount of heat it can hold... if you don't move the heat out and let new air come in, the room will become warm, the cards will not be able to get rid of excess heat, and will cut off until the heat has dropped below a set level.

-You don't need an optical media drive. If you do, you really only need it for the initial setup. If you have your Windows install as an ISO, you can use Rufus and put it on an 8GB USB easy.
-If you're going for the crate setup... get zipties to hold things in place. You MIGHT also consider buying a momentary power switch, or you can set your computer to "On Power loss, restore power to ON."
-You're probably going to need a network switch, and network cables. (If you know how to make your own network cables, and have access to tools or are willing to put down money for tools... much better.)

For your whole setup, you'll probably want a single setup of monitor, keyboard, mouse too. You'll probably only use it now and then, but its useful to have it rather than moving your personal desktop one around.

In my case... for the fan nearest the computers, I didn't go super powerful... just enough to get a steady air supply moving. I'm mining in my unfinished fieldstone basement which also has a dehumidifier contributing to the heat, and needed to force the hot air upstairs to exhaust outdoors... so I got a powerful Vornado fan that can push a distance, for my exhaust fan. In the winter, though... I'll be sucking in enough cold air from the fieldstone walls that I probably won't need the exhaust fan, and if I do... its extra heat for the rest of my house.