About 6 months ago, I bought a refurbished MacBook Pro 2.4 15-Inch (Early 2008/Penryn) from Apple for around $1300. ifixit.com will give me $1250 cash for the computer now. I am considering buying a 17" MacBook Pro with at least the same speed processor on craigslist or ebay. I like the fact of the larger screen, and portability is not much a factor for me. This would be the main purpose for the upgrade. I am a college student with a mac pro as well, so the summer would be a great time to take advantage of this since I don't need a computer to class and I can use my Mac Pro for staying on the MR forums. I would like to know what you all think. If I can make the upgrade without spending any money, should I upgrade? Should I only get the 17" Penryn model, or would the earlier Santa Rosa model be comparable to my current 15"? I wont get a uMBP; I already downgraded to my current 15" from a uMBP because of the glossy screens. Thanks for all advice!