XFX HD 6870 GPU i5 3570k CPU 16 GBs of ram 2 TB harddrive MSI Z77A-G43 motherboard IN WIN DragonRider case which has a few built in fans
but im not sure on what PSU to go for, Corsairs website listed that i go for any of their PSU ranging from 550W to 700W... I was going for thw 650TX v2, but i was hoping to get something a little cheaper, as the cheapest site i found with it has been out of stock with that PSU for a while now.... can anyone recomend any better/cheaper alternatives to this PSU that are on UK websites?
More aboutrecomend good system
A good quality 550W PSU is sufficient for that build. The XFX PSUs are on sale here in the states. They're made by Seasonic and are awesome PSUs - get the 550W and you'll be good to go.