I have an 80gb 5400 rpm hard drive in my 9300. My friend has a 60gb 7200 rpm hard drive in his M170. When we play games over the network, we'll often glance over at each other's screens to see who is loading faster. He usually loads about half a second faster, but sometimes I load up faster. Perhaps in a game that does more loading it would make a bigger difference, but I can't see it being a big deal. I'll take the extra 20gb, thank you.