Originally posted by CureTheSane
The other options I am looking at are....
AMD AM2 3400+
Intel P4 Dual Core D820
Would they be markedly slower than the Intel Core2Duo E6300?
Well, the E6300 is
a faster processor, but that's only in benchmarks. I'm not sure you'll feel the difference tho. So it's all about price/preference in my opinion. Personally, I'd go with a Core 2 Duo.
However, all three processors you are considering (with the corresponding systems) will be much
faster than your current computer.
I upgraded from an AthlonXP 1800+ to a Core 2 Duo E6300, and it flies!