Currently I have a 867mhz 768ram powerbook g4. It runs pretty well, but I do see some lag on some of my applications. (I run simultaneously finder, firefox, adium, itunes, word, textedit, calendar, macirssi, and preview) [I want to get into watching tv on my machine too) I thought about upgrading to a 15 or 17 inch mbp. There are some *really* good deals on the CD mbp's and I was wondering if this would suit me. Thanks.