depends on your budget , for low/mid look at the audio technica ( they have omny and cardioid , the omny sounds better), for betetr ones the sanken cub-1( cardioid,dont know if it will work properly with low voltage then 48 if you are looking to power it from microtrack - it can work with atleast 3v- bias ) , for much better the schoeps blm ( but then its about 2 grand for one ).