This system appears to be pretty powerful, but if anyone can make suggestions for an alternative system with similar performance that is cheaper it would be greatly appreciated. I was also wondering if the PSU is sufficient to power this system given that I intend to upgrade to a Crossfire or SLI system and overclock the CPU in future and would prefer not to have to replace the PSU.
I have an antec 300 and a 900. I prefer the looks of the 900, but the lack of dust filters is really a major drawback now that Ive seen the benefits of them from my 300. Look at the Antec 902, which is the size of the 900, but has dust filters for the front fans.
The 300 will not fit a 5870 unless you are willing to do some dremel work on the HDD rails to make space. It will fit a 10.5inch card easy enough, but that leaves slightly less than 1/2 inch before it hits the rails.
I unfortunately bought OCZ RAM for my last computer and now do not recommend it. It will barely run at the rated timings and voltage and has been problematic to get stable every time I decide to tweak the CPU overclock.
Ideally I'd like something based around a core i7. Originally I was looking at a 920 but Overclockers don't appear to sell it any more so the 930 is the alternative unless you can recommend another site where I could find a 920.