Schoeps for me.
Difficulty is deciding between the different omni capsules. MK2s has proved favourite so far. Would like whole set! Balls can be useful too, must get some. Capsule has slight high end lift which my old ears like.
DPA worthy runner up, just a bit too "flat" for my taste, I get something euphonic from the Schoeps.
Big OC818 fan, especially in Cardioid, but too big for my OMNI purposes normally. Prefer SDC.
Never see Sennhesier much...sure they are good.
Gefells get knowing looks but I have not tried that I can recall.