I thought this taper was looking for a stealth rig, not open taping. I've heard good recordings done with ECMs before, but nothing that'll blow you away. In my personal opinion single point stealth rigs don't perform anywhere near as good as moderate to higher end mics will. If the ECM mics were so fantastic then they would be standard for tapers since they're so cheap. The experienced ear isn't going to say, "wow, this is the most amazing show I've ever heard", but they can do ok. In the same price range you can pick up a pair of CSBs or the Squids even. If you're a taper who is extremely unexperienced and knows very little about recording technology of any kind than an ECM might be a good option, they're designed to be powered via the recorders pre, also known as the Mic In on minidisc recorders. The situation I'm in now though is where you'll be if you buy a cheap mic setup, you'll want to upgrade. I'd VERY STRONGLY recommend saving your money and investing in a DPA 4061 setup which can be put together for $500 or less if you go with ebay mics, or look into getting a pair of SP-CMC-8 or SP-CMC-4. The sound professionals mics are going to be out of stock until April according to a different thread, but there is a pair of cmc-8s in the yard sale right now or will be soon. So save your money and buy a respectable setup or else you'll have an extra set of shitty mics collecting dust very shortly. The resale on low end mics is pathetic also so don't waste your funds.
Now about single point full body mics, coolness. Less gear to haul around is always a plus, but I'll be a wiener and score a copy of someones schoeps source instead of making my own. I'm a stealther and don't really see the point of wasting all that money to tape bands that are recorded every night they perform, but that's just me. So yeah, I'll bust out full body mics to tape local bands and what not for friends but that rig is currently on suspension until I get more money to waste. Hope the chatter is informative to people at least. Get out and tape. Peace.