So, I'm thinking of buying a 15" MacBook Pro. I just went to check it out at the Apple Store, and it seems huge. Do people actually carry that around like a laptop, or mainly use it as desktop replacement? Currently I have a 12" MacBook, and I used to have an iMac, which broke. So, I was thinking of buying a 15" MacBook Pro rather than a new iMac. Perhaps keeping my 12" MacBook alongside the 15" MacBook?