You have one of the best laptops out there! Have no buyer remorse! I feel for you that at 1300 quid we can get a much better spec PC laptop (2.5GHz Penryn, 320GB drive etc). But nothing beats the MBP timeless design and the intuitiveness of Mac OS X.

I have the same MBP as yours and I love it. I don't actually do any graphic design or game on it, bought it simply because of the larger screen and gorgeous aluminum casing. That's why I went for the base 2.4GHz model.