I don't have time to make a full post now, but I can tell you that I don't expect Apple to ever include anything more than integrated graphics in the MacBook line. Also, I think your specs are very optomistic, for example:Right now, Apple's 15" 2.16 GHz MacBook Pro has:
- 2.16 GHz Core 2 Duo
- 1 GB of RAM
- 6x SuperDrive Dual Layer
- 120GB Hard Drive
- 128 MB ATI Mobility Radeon X1600
So for $500 less, you get the same size screen, a processor that's only 160 MHz...