hi guys, my powerbook G4 12" is dead, the HD failed and i need to replace it. apple is asking for 500.00 to replace it with installation. i know, i know, it's ridiculous. so i'm here to ask for some help on choosing a new drive. 1. does higher RPM mean more battery drain? 2. does higher RPM mean higher risk of damage? 3. what is the concensus on the best (mean most reliable and dependable) HD on the market for a powerbook? thanks fellow Mac Rumor readers.