For the best prices, fast shipping and no taxes (Unless you live in CA or NJ), you can not go wrong with Newegg. I would bet that Newegg will have better customer support then some local store too.
I know you would like to be future proof and all, but I don't think an SLI board is your answer. The way I look at SLI is, if I put two cards in my computer for double the price, then I want to get double the performance. This is not the case, you only receive a 25-40% increase in performance over a single card. In 2 to 3 years when your video card becomes obsolete adding another identical card will do very little to solve your video card performance issues.
You can do a lot with $1000, but with a little more you can really future proof yourself if such a thing exists. The best items you can put your money in are a solid case and quality power supply. Here is a recommended build:
Case: Antec P182
PSU: PC Power & Cooling 610W
Motherboard: Gigabyte EP35-DS3L
CPU: Intel 8400 Wolfdale
Memory: G.Skill DDR2-1000MHz 2x2GB
Video Card: eVGA 8800GT
Hard Drive: Western Digital 400GB
DVD Drive: Lite-On 16x DVD-Rom
DVD Burner: Lite-On DVD-Burner
Floppy Disc Drive: Samsung FDD
Monitor: Acer 22" WS
With shipping you will be under $1200, and after rebates it will be even cheaper, probably closer to the $1150 mark. Some places you could reduce that amount with little or no performance decrease would be with an E7200 to replace the E8400, a 9600GT to replace the 8800GT, and a 2x1GB kit to replace the 2x2GB kit. Don't skimp on the case and power supply, that would be my best advice.Edited by euphoricmix - 6/14/08 at 7:46am