So what should I be looking for in a motherboard assuming I go with the i7? (which is looking more and more likely)

And as I see it, the prices would be:

288.99 Processor - i7 920
75.99 Ram - Crucial 3x2GB
270.00 Motherboard (worst case scenario)
0.00 Hard drive, optical drive, monitor, Power supply(assuming 500W is enough), graphics card (GeForce 7800)
-------
634.98 + S&H

Did I miss anything? (I'm guessing so because that doesn't seem to bad considering it's an i7 machine...)