Preparing to buy either a pair of CMC5/MK4 or CMC5/MK21 to fill in a gap in my mic collection. I do not have a cardioid pair and very occasionally need an ORTF pair to tame an ordinary acoustic. Now the question is, which capsule to buy. I dislike cardioids, but need to maximise my reach with this purchase. I like recording with MS a lot, so my question is, what is the MK21 like as an M mic in an MS pair. I feel that a pair of MK21's will be nicer in ORTF, but that it may be a little shy on image assertion as the M of an MS pair, where the MK4's maybe better. Thoughts from those with direct experience in MS and ORTF pr recording with the MK21 are appreciated.