I've heard that Hitachi makes some good large drives. I think their highest is 400gig.
Although, I own an 80gb Seagate, and it's been quite stable for about 6 months now, and quiet as a mouse. I do know that Seagate makes some 200gig drives
though I know not if they perform better/longer than WDs and Maxtors.
One thing you might want to do is get a themometer monitor for your hard drive. Make sure it stays below 140F, well, thats what Seagate says for my HDD. You might want to check with the manufacturer to see what the reccomended temps are.
My PC was locking up everytime I worked the HDD too much until I realized I had it sandwiched between an older 30gb and the floppy. When it really crashed was when I coppied large amounts of data to or from the older drive. One day I went to ground myself on the drive mount and nearly burned my fingers. That's when I mounted it in an empty 5.25 bay and removed the bay cover. Soon I will get a new case that will have a 60mm fan blowing across all my hdds.