Right now I'm running two of Maxtor's 300 gig MaxLine III drives and one of Seagate's 400 gig 7200.10's, all internal, all PATA (EIDE). No complaints with any of them, been using the oldest one (one of the two Maxtor's) for around two years now. I add to my collection and replace dead drives as the sales happen, but if I remember right the most expensive one was the Seagate, at around $120 before rebate. Anything 300-400gigs is so cheap right now you don't really need to wait for a sale, Newegg or Outpost should both have a few under a hundred bucks. I wouldn't recommend going any bigger than that on a single drive for a while, the price jump isn't worth it and I don't consider the tech mature enough to trust.
Hard drives are like printers, though--you ask enough people and you'll hear that every brand is absolutely, postively the worst product ever created and can only be relied upon to burn your house down and kill your cat. That said, I've had bad experiences with IBM (oh Deskstar, why oh why did I rely on you) and Western Digital.