For your budget and purposes, the AMD 6 core cpus are the best bet. The 1055t is currently about $200 US, and a good motherboard will probably run you around $100; this leaves you with not too much to spend on RAM unless you're willing to go over budget by about $13 US. Most decent 4 gig DDR3 RAM kits will be in the $100 US range. I don't know what your selection of motherboards and RAM is like though, so I can't really give you any advice there other than on brands. Gigabyte, ASUS, and MSI are good for motherboards, and GSkill and Mushkin are good RAM bands. If you want, you can put up a few that you like and I (or someone else) could tell you if they are any good.