What is a good desktop to record minecraft?

I would like a good pre built desktop to record minecraft higher than 40 fps. I would also like to be able to get modpacks such as feed the beast or pixelmon My budget is 0-800 USD.

You can run minecraft on literally anything. It's not a question of if you can run it. It's if you have enough storage to save all the footage. I would recommend getting a laptop and get a bunch of external drives to save everything too. Or if your laptop is good enough (core 2 quad or better), just get a few external drives and you're pretty much set.