I having a MBP 13" (mid 2009) and iMac 21.5" (mid 2010). However, I figured that I did not use my iMac at all, beside surfing web. So I decide whether to sell my MBP 13" and iMac to get a MBP 15" which is larger screen and portable and I can max it out? Do you think it is a good deal?