How much more of a speed difference would I gain by going from a standard IDE Hard Drive to a SATA Hard Drive? Isn't there like a 150 SATA and 300 SATA? I'll be upgrading my HDD soon and I dont know what to get. Im really looking for a 160gig HDD, but I was considering a Raptor as well. Dont know if i'll get the raptor though, as it's a little more pricey. Give me your thoughts please!! Thanks.