Well,finally seem to be some one is goin to hav a fine rig..
prices here sux hard.The cheapest and best place will be Barclays.Then there is NEAT.At EPSI(ASUS centre is owned by them too)U can get ASUS parts but for doubled price.Mitech hav MSI parts ,they r cheap but dont hav much options.
E 6600 would be down in next two weeks here in LK.E6300 got down and as more CPUs are coming in,I'd pretty sure it be.
If u gonna get a High end VGA,Only the EPSI hav DX10.If u dont really really need DX10 u can settle with some high end DX9.(7900GT/S/7950GT,X1950XT/X)
Coz the DX10 games will be hard to drop by more in quantities until about 2009.8800GTS 320MB is the bang for the buck.As u said no point of highr frame buffer memory,unless u play with big resolutions(Awkward).But nVIDIA hav accepted that there is a driver bug for it and we will hope that those nvidiots will fix that soon.
For a highend mobo U have to go to ASUS centre(or EPSI Head office) for sure.
An ASUS board with Intel P965/P35/975X or nVIDIA 680i is highly recommended and only available.They will cost around 25k.Namely a P5K premium P5WD deluxe like..visit
http://lk.asus.com/products2.aspx?l1=3&l2=11 for more available asus boards.I assume these three will fot you in for 100k LKR(I HOPE!)
.
There are Corsair Midrange and high end RAMs are available at Mylinx.Nunet do PATRIOT.Others are crap.(My fl_lckin Kingston Value DDR400 refused to run at DDR500 today while I OCed to render some videos.Crap didnt last much with OCs.

)Go for some 667 while they can go to 800 without changin volts.Look for the tight things as always

.I heard Kingstons do at 5-5-5-15-1T.So others would be better than that.
Kep tellin us about ur new rig.C ya.