You'll likely get a whole slew of different answers as we all have different preferences: tolerances on size/bulk, battery/power consumption, and of course sonic signatures of our mics/pres/ADCs/playback systems, etc. For me, the perfect stealth gear is:
Schoeps MK41 (hypers) / Schoeps KCY 250/2Ig > Sonosax SX-M2/LS2 > Sony D100
Ballpark price: around three grand (and reflecting on that price, damnit I've gotta get out and stealth more!). I've thought about throwing a modSBM-1 in the mix and may do so in the future, but am not sure I want to schlep around another piece of gear in my crotch.
Actually, I take it back - best stealth setup is MK41 / KC5 / CMC6 > V3 > NJB3, but I can only swing that setup when I don't have to crotch the gear!