Building a Corei7 system. Local computer shop has no-sales-tax deal this weekend and offers 4780 for $199.99 and GTX 260 for $215.00. The main board I chose can upgrade via SLI or CrossFire later so ATI vs. Nvidia doesn't matter.
Thanks all. My main board choice can do SLI or CrossFire so for the extra $15.01, I went with the EVGA GTX 260 Core 216 because it is darn close to a 280 (216 shader cores) and its the superclocked edition (626 MHz Core / 1350 MHz Shaders / 2106 MHz memory) as well which should mean I have a good chance of pushing it even higher.
But in the end, either way I don't think I could have gone wrong as you all noted. Once the price drops more after the 285 starts shipping in volume locally, I'll pick up another and SLI 'em.