[quote name='MICHGoBlue']The one OP posted about is indeed 5400 RPM, which is optimal.
Many 500 GB HDD are cheaper on NewEgg, but be careful, most of them are 7200 RPM, those run hot in a PS3.
But I agree Squarehard, should be relatively easy to find a 5400 RPM 500 GB HDD for $50 or so.[/QUOTE]
I wouldn't say that a 5400 is optimal. I ran a 7200 in my launch 60GB for 3 years and it wasn't any worse for the wear. Sony always included 5400 rpm drives, but they don't advise against 7200s anywhere, and I've never noticed much worse heat output as a result of the faster drive.
Since I moved to a Slim with a 5400 I've noticed the write speed being considerably slower, and it really made me regret not waiting for a reasonably priced 7200 rpm 750GB. Though it could just be the Slim's writing function being slower...