[arokh]

I can't decide between i3 and i5. So xbmc runs smoothly on i3 but what if I also want to do more with it. I also want to use nzbget, couch potato and sickbeard as well. Those programs for sure.. but also, maybe use avstodvd for converting mkv to dvd. Too much for i3?
I was planning on getting 4gb ram.

If you're concerned, why are you even thinking about it? Just go for the i5, the price difference is tiny.

Oh, and why settle for nzbget? Check out sabnzbd it has fancy stuff such as a web interface, smartphone apps, folder sorting, script support etc etc.