Ok... I'm probably gonna sound like a guy who has absolutely no idea that there's a recession going on, but here goes... I've got the 1st gen UMBP (15" 2.53GHz, 4GB, 320GB). Got it in October the day it came out. The release of the new 15" with Internal Battery got my heart beating pretty hard... Come to think of it, ANY new release gets my heart pumping. I just wanna know if the differences between the 2 are worth the upgrade. Here're the answers to the questions you'll probably ask: 1. I don't sell my machines. I usually just pass them on to my younger sis or bro or just keep 'em on my desk to loan 'em to friends every now and then or for when I need an extra machine. 2. No, I'm not a video editor or graphics designer by profession, although I do a little graphics design for my business every now and then. 85% of the time, I use my machines for surfin' the net. 6% for playing light games. 5% for document typing and video watching. 4% for graphics editing. 3. 90% of the time, I have direct access to a wall outlet. Seriously, I'm just the type who likes knowing that all that stuff is under the hood despite not having a need for it. Are the differences between the 2 UMBPs worth losing sleep over?