I won't to drop $150-60 on chip and under 100 on mb
Okay, that is a decent budget for CPU and motherboard.
Let me ask 2 more questions to help us make better recommendations:
1. What monitor size & resolution do you want to play at. The answer here looks like 19" 1440x900 or 22" 1920x1080, etc...
2. If you already have a Video Card, what is it or if you still do not have it, how much are you willing to spend on it?