Interesting looking mics.
See if you can find a dealer that will let you audition these. I did this when I bought my Nevaton mc51 large diaphragms. I could find no field recordings made with them and I was leery about dropping almost 2k on relatively untried mics(untried for what we do). I worked a deal out with a dealer (thanks Dirk!) that I would pay so much money to audition / rent them for a month or so, with the agreement that if I purchased them, the rent fee would be applied towards the purchase price. It worked out well and I ended out buying the mics.
Good luck, and thanks for being willing to take a chance on something different!
jd