Seagate ST9120821A-RK 120GB 2.5" http://shop2.outpost.com/product/4795259?site=sr:SEARCH:MAIN_RSLT_PG It's at Fry's for $140... I think this is a good buy isn't it? Will it work in my soon to be here MacBook, and be reliable? And just to make sure since I have heard mixed things... if I replace the HD myself, does it void my Apple warranty? Okay last question... lol... how the heck do I install this thing and have it be my main and only drive (duh its a laptop right)? I mean, I know how to put it in, but is it easy to figure out how to install Mac OS X from scratch? This'll be my first time doin this exactly... (I've installed a hard drive before but only on a PC and as a second drive, not the main and only one...) Thanks in advance for your help!