I'm planning to buy a new MBP in maybe a week from now. Do you guys know if the difference between the 2,4 and the 2.53 is so big in terms of performance? My main concern is the GPU which goes from 256MB to 512MB... They have 200 pounds difference (education discount) so i don't know if it's worth it... I use it for graphic design purposes (illiustrator, photoshop, final cut)... Thanx guys!