Alrighty sir, first of all, who refered you saying we know more than anyone? (I mean, we do, but I'm wondering who said it).
I don't have time to get you specific part links and prices, but in your case it is obveously going to be a dual cored SLI option.
I would recommend the Highest end AMD X2 in your case, because you have the money and the need from what it sounds like.
You should pick up a motherboard that will support 4x1gig slots of ram that WILL run at 400mhz.
Also, I think 2 gigs of ram would be good for now. Make sure to get some Samsung TCCD chips on the ram (those of you who know.. maybe u could suggest?)
The card.... Get an nVidia 7800GTX for now, and jump into some SLI later like you said. That should bring you probably about 400 short of your quota, thats enough to get two big 250GB seagate 16mb cache SATA harddrives and RAID them for awesome performance.
Thats my take, good luck and I'll check back for more later.
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