Need advice for building LTC rig

[coinking]

So I'm planning on building a ltc mining rig and I have some parts picked out.. but I need help understanding if I need better parts

here is what I have so far:

http://ca.pcpartpicker.com/user/coinking/saved/2NjP

I plan on getting 3-5x 7950's to do the mining. I will start with 3 and upgrade eventually to 5 cards which then I will upgrade the power supply as well (to 1050w? can someone confirm this?)


Here are my questions:

1.The mobo pci specs:
PCI Express 2.0 x16: 3 (dual x16 or x16, x8, x8) & 1 (x4 mode, black)
PCI Express x1: 1
PCI Slots: 1

Is this mobo going to be able to support 5 cards? I've seen others use a weaker mobo in their builds so I'm wondering if this $200 mobo is overkill?

2. Is this power supply enough to run 5 cards? I realize it will be enough to run 3 (i hope) but what ps would I need to run 5 7950's or even 4? Seasonic 1050w?

I realize I will need risers, a hd, a fan and a case (most likely use a crate) but is there anything else I need to order? Thanks for the help in advance!