You just need a mic. that can be powered from 12 - 48V phantom (sometimes quoted as 9 - 50V) - this will be in the range that can be powered by the 30V of the MicroTrack.
This throws out most of the best mics that are normally 48V +/- 4V (eg: Neumann, Schoeps, Sennheiser MKH, etc..)
As a start - Sennheiser K6 series is OK and many AKG condensers. But the best thing to do is to find what you want and just double-check that it is 12-48V and you'll be OK. If not, go to your second choice.
I hope this helps.