Fry's Electronics has a decent offer I spotted this morning for those of you building a new CS5 editing rig...
Intel Core i7 930
Fry's price after $20 rebate $364.99
Newegg.com's price, over $500 when you include shipping.
My budget home computer has a similar but different Gigabyte motherboard model, the EX58 UD3R rev. 1. It only has 4 Ram slots. This model motherboard on sale at Fry's is an X58 with 6 Ram slots capable of 12GB of Ram, or if your budget allows expensive 4GB modules; 24GB.
Here are the motherboard specs from the gigabyte.com website: