Looks like a very solid build. Make sure case is big enough to accomodate that videocard, its long. Also, with the i7's you can get by with cheaper RAM, say G.Skill 1066, and still not take a big performance hit. You would only see it a difference in benchmarks in all likelyhood.
Yeah your probably right, I wanted to make it easily upgradeable in the future. So my plan is in about a year to buy a 2nd 5850 and cross fire that, and still have a kick butt system.
Not have to by extra ram or upgrade it etc.
Any opinions on my motherboard choice?