KF1 or KF2 for a Mac?

So, I can only buy one Killing Floor game. Should I buy KF2, and go through the hassle of having to run it through Bootcamp for maybe forever, seeing as the devs aren't looking at a Mac version? Or should I buy KF1, who's online community will probably die out in a few months?

I'd like to play either game as soon as I can, so maybe that could impact the decision too (more content in KF1 at the moment, etc.)

Thanks for the help!