I am a current Windows XP user (just got a new computer a few months ago) and I am wondering how powerful a Mac I need. I do heavy internet use, video/image editing, word processing, watch DVD's, iTunes, and sync it up to my PDA. I really want an iMac (should I sell my Windows laptop? I love it and it's brand new!!). Will the 1.6 Ghz be enough for me? Or should I get a Powerbook? I am looking in the $1500-2200 price range; I want at least 768-1 GB ram. Suggestions?