I just found out about what the turbo boost does (other than assuming I knew what it does). So I have a 13" 2011 MBA i5 4GB RAM 128GB SSD 1.8 GHz (turbo boost to 2.8 GHz). I am looking at the 13" 2012 MBP i7 8GB RAM 128GB SSD 2.9 GHz (turbo boost to 3.6 GHz); how significant of a performance upgrade would I see in running simple tasks and more intense programs? I mainly use large excel and powerpoint files (graduate student) and if I decide to go into computational work I could use this computer for modeling purposes. I understand the MBAs are the "future" of computers but the MBP has additional ports and an optical drive. I want to keep the SSD option since I don't think I would go back to a HDD (they're so snappy!). Thanks!