I´m planning to do the same. The Airmax antenna is need, compact design but I don't like the ubnt OS. I prefer MT. You only have to find the right cables to attache a rb radio to these connections of UBNT.
As far as the antenna is concerned it is presented a radiowave by the radio. The radio wave has no tag on it saying it was produced by "x" manufacturer. So the radio can be any make, the wave it produce will have to be of the same nature. Differences in protocols, modulation, TDMA or whatever is digital info the radio's on both ends have to work with. But the electromagnetic radio wave is the only aspect the antenna is made for.
So imho if the Airmax antenna is as good as they say combined with the design I think it is a very good combination with rb.