Better lens and post capture processing
I don't know about the Rebel XS. I don't even know about Macs! I'm only going to get the ball rolling with some general points. You're going to get a big imac, but write about cost-effectiveness. If you were really worried about that, you'd get a PC. People will find it difficult to advise you unless you make your photographic interests more specific so they can 'solve' your problem.
|I am an Elephant by Bibix|
from An A to Z of Subjects- Week 5, E
|Mossy forest panorama by Jill Hancock|
from Your point of view
|Ship Moon and Stars by LJJohnston|
from For creative newbies only..