I actually had a good pair of Core Sound Binaurals that I used for 4 years and never really had a problem with them except understanding the difference between omni-directional, cardioid and so on. I'm guessing you are stealthing since your mic options seem to scream that. I recently went from stealthing to open taping BUT I ordered Church-Audio's mics and 9100 preamp for my stealth rig. Which by the way I also use the MT. From what he has told me about his mics is that they are in-between omni-directional and cardioid, which for my stealthing needs would be just about perfect. Don't take my word for it though, I haven't taped a show using that set-up yet but I'll be sure to give my review come October when I will need to stealth a show.
When I tried to upgrade to the Core Sound High End Binaurals (HEB) which cost over $1000 and mind you this is still without knowing the difference between cardioid, omni etc. I really had a hard time getting a refund from Core Sound. It took 2 weeks after they received them, wouldn't answer emails, I finally had to call him and ask him what was going on. He finally gave me a refund via PayPal but it took another week for the funds to clear! So that was my bad experience with their service but the Core Sound Binaurals that I bought in 2003, never had a problem with them.
So take it for what it's worth.
I'd go over to the Archive and search the microphone you are contemplating and the Microtrack to see what those recordings sound like. And it will make a world of difference in your taping position, venue, etc. Hope some of that helps?