Anybody upgrade to one of these? I'm currently brushing against capacity on my 320 GB/7200 RPM Hitachi and the 1TB of space sounds like a dream. But the rated speed of 5200 RPM disturbs me. Some sources say the increased capacity makes up for the slow spindle speed, and the 3 platters make it equivalent to a 7200 RPM drive. If you have it, have you noticed a speed hit? How loud is it?