[H]ard|OCP has a pair of system reviews up, the first of which is WidowPC’s WidowFX.  That’s followed up by the Maingear Prelude.  Consider these 2 as a good start for getting new system with very little assembly required.
“The experience that we had with WidowPC on the back end was above average. They have friendly and responsive techs, and, essentially, they build a stable gaming system— once you get the parts that you ordered. However, there’s no telling if that’s what the next consumer may receive, as the system we ordered had parts in it that we didn’t order and didn’t expect to receive. There is a major disconnect between their Web site, their phone sales, and the final product that we received. Their QA process seems absent—it should have been obvious from the start that the 430W Raidmax PSU with 13A over the +12V rail was woefully underpowered for our system’s configuration.”

Here are some more Systems articles from around the web:

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