I pretty much only shoot with primes, not a big fan of zooms and their 'crappy' IQ (compared to primes that is).
I already have 50mm prime, it's just that I'm not a big fan of the 50mm focal length on a crop. I'd only get the 44-2 58 because of the cool, harsh bokeh - which I think is nicer for video than stills.
I really do want to get into video though, so picking one up wouldn't be bad I guess. It's just that I need to save money for the upcoming summer holidays... meh!