I've had my Macbook for almost 3 years now and aside from an out of warranty Cd-Rom replacement that I installed myself, it's been good to me. It's a 2.0Ghz with 4GB ram and an 80GB HDD. I run spaces for virtual desktops and at any given time usually have the following running at the same time: -Safari with 5-10 browser windows open -Excel with 2 or 3 spreadsheets -Word with 1 or 2 documents -Azerus/Vuze downloading a movie -Adium -TextEdit -Itunes playing music It handles all that pretty well, but it seems to be at its limit. I was thinking about upgrading and noticed some nice Macbook Pro's from mid 2009 on ebay for about $1200. They aren't the new i5 processor, but that's out of my budget anyway. I have been looking on ebay at a 15.4" 2.53ghz with 250gb HDD and 4GB ram. Do you think I would see a substantial difference? A big enough difference to warrant a $700 upgrade? ($1200 less $500 sale of current macbook) My friend suggested that I just get a brand new unibody Macbook, and it's pretty close to the same specs as the Macbook Pro on ebay. It almost seems like the Pro's are overpriced for the specs they have, what do you think?