A small diaphragm condenser is what you want so any of those three mics should work, maybe add a Shure SM81 in there as well. I would pick the KM184 first, then the Oktava's if you had them modded, they sound really good after that. Just about all Neumann's are over priced but for a reason, they do a great job and are usually one of the best in their range. I just used a KM184 on a sarengi and it did a great job of picking up all the details.