I would say for more experience uses. You could just buy one of the new pentium dual cores E2XXX series and then overclock that to about 3.0ghz or more, ( get a nice cooling system and mobo with the extra money from buying the cheaper cpu.) The only thing you miss out on is some L2 cache.
http://en.wikipedia.org/wiki/Intel_Pentium_Dual-Core
Here are the prices.
http://en.wikipedia.org/wiki/List_of_Intel_Pentium_Dual-Core_microprocessors