My 2009 13" Macbook Pro 2.26ghz (with Nvidia GeForce 9400M) is my only computer. Originally i wanted to sell it to get a Mac Mini for a HTPC set-up along with an iPad since i know i would miss the portability. But then i thought a used 2006-2007 era Macbook (Intel GMA 950) might be a better solution. How much of a downgrade in performance would i see in iMovie, Photoshop, HD video play back, Netflix, trackpad (multi touch and gestures), etc. I don't play many games but i do play Plants vs Zombies often.