i would recommend the CMC-4, which uses the AT853 cardioid caps. you can use it for now with the BattBox w/roll off or the SP preamp they sell.
later on, you may want to have the CMC-4 modded (by SP or yourself) to the phantom power supply. this way, you could add a separate preamp like the UA-5, MP2, Beyerdynamics MV-100, etc. you'll notice a large improvement over the battbox power.
for the size, the cost and the performace of the CMC-4's, they are great stealth mics.
marc