Shoutbox

You're better off spending the $20 or so more for the 200GB

What are you using it for? Because if you're using it for a high-end gaming computer you might want to step up to 10,000RPM, but only if you want to spend the money, otherwise go for a 7200RPM.

Either way, I suggest Western Digital or Maxtor. You can find a large list of HDD and the NCIX top 10 selling HDDs here:
http://www.ncix.com/products/index.php?majorcatid=103&minorcatid=109


Edit: Ya, I forgot to mention -  look at the CACHE size and avgerage seek time. You want a large CACHE and a quick seek time.