For my previous MacBook upgrades, I had used a Hitachi hard drive that failed (Never using Hitachi again) and to replace that, a WD Scorpio, which had been pretty nice. I'm planning on upgrading the HD on my MacBook Pro, as I am running out of space. (20Gb left and it's a bit sluggish right now. Maybe it's the lack of RAM too, but I'm going to do some disk-space intensive stuff soon.) What would be a good stable HD?