|If you have a decent motherboard, simply overclock what you have. You can crank the heck out of the Core 2 Duo based Pentiums.|
And remember, the new Pentium is MUCH better than a Pentium 4 or Pentium D, so don't be fooled by clock speed. The E2160 kicks the crap out of P4's that run at twice the clock speed.
EDIT: nevermind...you have an Acer.