may i ask a question w/o offending anyone who responded?
why get a "K" series cpu on a H61 chipset?
OP i would think any grfx card higher than what you are getting might bottleneck by the i3.
think i5 in your price range.
Most of the time the price is very very comparable. Usually less than $10 difference between the K and non-K series. Buying from somewhere like BestBuy or finding a nice online offer from NewEgg.com or similar results in the K series actually being even cheaper than the non-K series.
While your right, you can't overclock it on a H61 chipset, the motherboard could always be changed at a later date for a cheaper price than a new CPU.
@OP - I would certainly urge you to look into buying a P67/Z68 chipset motherboard rather than a H61 if your going to seriously consider buying the i5-2500k.