2100 is better, GPU for under $200 I would say a GTX 560 but if you can reach for the 560 Ti
This is incorrect . Tomshardware system builder marathons using these two processors showed the strengths and weaknesses .
The phenom was stronger everywhere except games , where it was a fraction behind .
Even using the stock cooler the phenom could then be easily over clocked to beat the i3 2100 in games , while the i3 cannot be overclocked at all