Dell Home has Xbox 360 Elite 120GB system bundle including Forza Motorsport 2 and Marvel Ultimate Alliance games for $300 ($291 with DPA) with free shipping.
If paying with Dell Preferred Account (DPA) you may save an extra 3% (4% at Dell EPP), here is how:
1. During checkout, select Credit Card as method of payment
2. Click "Change Payment Type"
3. Click "Choose" link under Credit/Debit Card (again)
4. Under "Save 3% (4% at EPP) with Dell Preferred Account! (Discount applied at Final Checkout)" click "Click Here to Take Advantage of this Offer" link
5. Click "Choose" under "I already have a Dell Preferred Account" if you have one, or sign up for a new one if you don't
6. Checkout, enjoy your 3% (4% at EPP) savings.