Actually, the G2P hasn't gotten the best of reviews from NBR.

You can also go the barebones route with the Asus Z84P. The vendor can install the processor (of your choice) and optical drive; you can purchase the RAM* and HD for cheaper elsewhere and install it yourself. It'll end up being about $200-400 cheaper than the HP.

* - Newegg right now has a deal for 1gb Corsair DDR2-667 sticks for $35 after rebates. Rebate is good for up to 10 sticks.