Mining in UK/EU. Hardware info

[mewantsbitcoins]

Mining seems quite addictive, so I'm here once again looking for your help.

I would like to build a dedicated mining rig.
For the psu I chose this

What are the cheapest options for 2+ cards motherboard and processor here in UK/EU? I'll be using 5870/5850s if that matters

I noticed that in USA hardware is very cheap in comparison to UK, so I would like to know maybe there are some places in EU where prices are more reasonable?

[alexdrans]

Why such a monster PSU for only 2 5870/5850?

My motherboard supports 2 cards (Gigabyte 880GA-UD3H) so I'm just selling my GTX 560Ti, buying a single 5870 (For now) and then putting another in there at a later date. It's not a dedicated mining rig though.

[mewantsbitcoins]

At the moment I have a single 5870 and another 5850 should be with me soon. My decision regarding psu is so I have the option of adding more cards. Ideally, I'd like to buy a motherboard capable of supporting 3 cards and once the first two pay for themselves I'll add more. But it again depends - maybe it's cheaper to buy 2 mobo's with 2xpcie. In general I'm looking for advice what short/long term mining strategies are most efficient.