Upgrading GPU

gtx 560 will be good

How much are you willing to spend? "decent priced" can mean different prices for different people. Are you wanting below $300, or what?

I also agree with @dark rai20 that the GeForce GTX 550/560 is a good option, for $150-$200 it's a really good deal for what you're getting. To give you an idea the GTX 550/560 would be good for games such as Crysis 2 and Battle Field 3.

The 550 is $150 or so, and the 560 is $200.

I understand you want a GPU with 250+ FPS; but can you let me know why? The human eye can only see so much..

I think the GTX760 is a good option, but if you're not willing to spend $260 for it(it comes with a free copy of Watch_Dogs, by the way), go for the HD7790, the best card you can get for 100$.

Perhaps you didn't understand what I said. I didn't say 30 FPS is the maximum they human eye can see. My point is that you'll never notice a difference between 120 FPS and 250+ FPS, it's just scientifically impossible unless you have superman eyes or something, so it's a waste of money.

i dont think people understand this to be honest, it doesnt matter if you are gettting 250+ fps because a screen refresh rate is generally only at 60hz which means that you are actually only seeing 60 FPS so you could have 1000 fps or 60 fps and they would both look pretty much the same. Your frame rates comes down to your monitor when you go over 60FPS.

Whatever he said ^

Only reason you'd want more fps is if you make videos to edit..

Just any graphics card over 200 dollars should do the trick haha