Newegg had that same ASUS g72 for $750 just a week or two ago, looks like they're sold out now tho.
For $1200, you can get something better than all of those. check out the Asus g73 at best buy... has the i7, gb DDR3, and ATI 5870, which trumps both those video cards. It's a great deal... the only downfall of it is doesn't have a 1080p screen or bluetooth. If you want the HD screen and bluetooth, check out the normal Asus g73 - but it costs $1500