Please Critique my new potential build...

For future reference, for people to view your wishlist it needs to be a public wishlist, not just saved. Heres the new link.

http://secure.newegg.com/WishList/ [...] er=8817754

Anyways, everything looks aright. That ram is pretty expensive, you could get something like this:
http://www.newegg.com/Product/Prod [...] 6820231193

and that psu is really overkill for your system, unless you plan on adding another 4850 at some point you could definitely go lower on that.

It's expensive for a reason: the timings are at its limit at that clock speed (7-7-6-18). For 7-6-6-24 (which imo, should be near equal to 7-7-6-18) timings compared to G.skill's 9-9-9-24, get this for $15 more;
http://www.newegg.com/Product/Prod [...] 6820227286

Will the performance booth be worth the $15? Probably not. The Mushkin is definitely not worth it, imo. But the silver (aka platinum) should be cooler looking through the case window at the very least.

And Windows 7 Release Candidate... can't you just get that online for free?

About your motherboard... do you really plan to get more than two graphic cards? If not, there are cheaper alternatives out there...

ASUS M4A78T-E AM3 AMD 790GX $129.99
http://www.newegg.com/Product/Prod [...] 6813131366
It still has 2 slots for Crossfire in case you do get a 2nd 4850.

Okay, so now it's time to do some calibration depending on your needs.

1) What is your monitor resolution?
2) What is "extreme graphics" and "hardcore gaming," or in other words, What games do you want to play, with what settings? With or Without AA/AF maxed out? (Please mention specifically what you plan to do with Crysis)
3) I don't get why people put "general net browsing/homework" on these computer requirements when they just said "extreme graphics" and "hardcore gaming" before hand. "I need a pistol that will leave nasty exit wounds on the backs of people's skulls. Oh, and I need it to shoot through that piece of paper, too." Just messing with you, btw. xD