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The pc you linked is very appealing. However, maybe I'm being over-cautious, but people have said that future generations of games may make those that opted for 2x8 crossfire wish they'd gone for a mobo offering 2x16. Other than that, I'm really set on a Radeon 4890.
If I could just get the 'Titan' pc with it's current offer price, just adjusted by having a mobo offering 2x16 crossfire and a Radeon 4890 with an X-cooler, i'd probably buy it. I know I'm being picky, but I really want the option of getting a second a these cards running at x16 in the future, it would give the pc a large lifespan of keeping up with the high-end games.
I know, I know, I built one in the past, but I'm leading a stressful life right now, and I just want that piece of mind of knowing that for at least a year, if anything goes wrong, there'll be someone to help me with it for no extra charge.
I will seriously consider the OC shop and their competitively priced rigs in a few months time. For now though, I'm going to upgrade my current pc to a competent level with value in mind. Having been away from gaming for a while, I'm shocked to see just how cheap DDR2 is these days. I'll get a fairly decent card and some new memory and keep this one ticking over while I save up.