I am going to upgrade from my current Intel Pentium D 2.8GHz HT processor to something dual-core, maybe even quad. My max spending limit is $150. I don't necessarly want the best out there, but I don't want a large bottleneck on my 8800GT that I will be purcahsing later. My Mobo has a 775 Socket. What is the best bang/buck I can get?