Your system choice looks OK to me. Anyway, please note that 780 means a three-slot SLI board, so if you do not even consider eventually buying a second (and in this case, a third) graphics card, it's a bit of a waste.
Yeah, I know. This is one of the main reasons why I want to build a system myself. I'm thinking seriously about SLI and I want the 2*16 PCIe. The nforce 680 will suffice. The PC that I'd build myself is difficult -> two different stores, the first at 10km, the second at 65km. The price difference and the availability of certain products made me go for this option.
The websites of the stores I go for are
http://www.comtechnology.be/shop/ and
http://www.codima.be/
Be advised: both sites are in Dutch. If you do not understand the language, I can translate a few words.
As you will see, I don't have a screen added just yet. My screen now is a Iiyama HM903DT (19inch crt) and it still works fine. I'll probadly waite after I bought the pc to add a really good screen rather then adding a mediocore right away.
From the first store:
Asus S775 P5N32-E SLI nF680i 188.02EUR
Western Digital Raptor WD1500ADFD SATA150 150GB 10000RPM 16MB 188.34EUR
Seagate Barracuda 7200.11 SATA300 500GB 7200RPM 32MB 106.38EUR
Antec Nine Hundred Medium Tower Black 96.04EUR
Windows Vista Ultimate oem 64-bit NL 166.93EUR
From the second store:
Intel Core 2 Quad Q6600 2.4 Ghz 8 Mb L2 Boxed w/ Cooler S775 €229
G.Skill 4096 Mb (2x2048) DDR 2 800 Mhz CL5-5-5-15 €105,00
Sparkle Nvidia 8800 GTS 512 Ddr3 + 2x Dvi €365,00
Voeding Zalman ZM600-HP 600W €109.5
Asus DVD-ROM SATA 16x48x Retail (Black & White) €20
Asus DVD Writer DRW-2014L1T SATA 20x DL/LS Retail Black €32
A few remarks:
*It can be that my power supply doesn't suffice for the SLI I'm thinking about.
*The RAM isn't the cheapest, because I saw the latencies differ for only €5 of price difference.
*The videocard is somewhat exotic I think. It's the only 8800GTS 512 MB I could find in both stores and that's why I want it.
*Perhaps it's better to buy both the CPU and the motherboard at the same store -> the first store sells this cpu for €237. Knowing that I'm not an overclocker, I bare PJ's suggestion in mind. The 6850 is going for the same price in the first store(€237), while in the second it costs €244.
edit -> Total=€1606,21