huge ones, like between VW Bugs and Ferrari's. The ones at the bottom of your list fit the newest and most powerful sorts of processors, using faster memory and can making full use of vid cards in the top tier or two. There have been several threads in here about the Athlon 64 chip as the best current performer, yet some referenced articles talk about gaming systems based on this chip retailing for $1300 or so, and build it yourself for under $1000.