badproduce

My processor is on borrowed time(3 years old),and will be upgradingin the next 2 weeks,but need help choosing which one. Current specs Pentium 4 519 3.06 ghz 2 GB DDR2 533 mhz intel D945GCPE w/1066/800/533 fsb Win Xp Home I don't need it to be mega fast,but I'd like to know how these 3 CPU's match up to my old cpu(I'm on a budget,so these ae best I can do) 1.)Intel Pentium Dual Core E2200 2.2 ghz 1 mb cache 800 mhz fsb 2.)Intel Celeron Dual Core 1.6 ghz E1200 800 mhz 512k cache 3.)Intel Core 2 Duo E4500 2.2 ghz 2 mb cache 800 mhz fsb How do these compare to my current CPU performance wise,as none of them matches the 3 ghz clock speed,but I'm certain they must have something(besides 2 cores) that would make them better,faster Thank You