FOr the price of the modbook you could get a PC tablet and the 17 inch Macbook Pro.
3 grand of markup? really?
Depending on the software used, this would be the ideal situation.
If I used a tablet for illustration and Adobe graphics apps I would just opt for the PC and 17" MBP. If I wasn't tied to the hip with Apple I could get a PC table, 17" powerhouse laptop, and quad core desktop with 24" monitor.
And if I took any one of the heavy lifting machine out I could get one of the many Adobe CS4 packages along with it.
Simply put, you could get an entire system for that $5000 price tag of one machine.