Hi, I currently have a macbook 2,1 (C2D 2,00 GHz, 2GB RAM) running lion, which is in trouble if I open flash sites, and streaming video while is running also only mail app! It's time to change it and and my doubt is between i5 (4MB RAM) and i7 (8MB RAM) in 2012 base configuration... and refurbished! My budget is closer to i5 but I'm willing to spend a little more to get a mac that is what I really need. i5: 1089 i7: 1339 I usually run simultaneously: mail, safari, itunes, excel or word and a USB 3.0 500 GB external hdd always connected via time machine. In the worst case, along with the programs mentioned above I run Aperture or PS for non-professional use (no raw photo editing) or dreamweaver and Cyberduck. Often I connect an external monitor with 1920x1080 resolution. I'm not a game player! what is the best choice? i5 (4MB RAM) or i7 (8MB RAM)? please don't suggest the macbook air because I want an expandable macbook! thanks!