Hello friends, My brother is giving me his MacBook Pro 2.2 Ghz 15.4 inch w/ Nvidia 8600GT and 4GB of RAM. The battery is completely shot and the hard drive is only 120 GB. Is it worth getting a WD Scorpio 500GB 5400 RPM hard drive (around $70) and a new battery (around $130) for it? Should I just go ahead and save up for a new macbook pro since I will be attending college soon? Any thoughts or comments will be appreciated.