I have a Pentium 4 3.0E HT and its done wonders for me for the longest. and not to long ago, these new Core Duo's started hitting the market, thus everyone was talking about how great they are. I really cant bring myself to go out and get one of these yet. My main reasons are because there still pretty pricy, and you really cant utilize all of that power in my opinion unless your encoding video and playing a game. I do both, but not at the same time ;]. Is there a noticeable Increase in speed or proformance if i upgraded? Or would it be the same, except like a shoe thats too big, with extra space (power) at the end if/when you need it?