hmmmm I was about ask same question. I ended up ordering the 2.53 model last night, but with the 250gb 7200rpm HD. This came to £1717
If I got the base model, I would have upgraded to 4gb RAM and opted for faster HD. I worked out the difference to be £180.
I am still thinking I should maybe cancel and reorder only because I dont even think I'll make that much use of the 512mb GPU. But at same time, I want to get as good as I can afford becuase my intention is to keep this laptop for 3-4years. I would have waited until next year to buy one but my Powerbook G4 was on its last legs after my cousin decided to pour coke onto it few months ago :-s
Suppose what I saying is that its a lot of money to fork out for a laptop, but I suppose in long term it will be worth it.........hopefully