I beleive that getting a dual core cpu will really benefit you for everyday multitasking and for future software.
Newegg has an Opteron 165 for cheep, and they will even thrown in a free gift, these line of processors are like the diamonds of OCalbe cpu's.http://www.newegg.com/Product/Product.asp?Item=N82E16819103588
I have an opty 170and it comes stock @ 2.0 Ghz, I OC this little demon to 3.14Ghz. Now thats a kiler leap in performance! :wink: