OK, now that I've read the whole thread, I'm going to (predictably) chime in for omnis. If you're going to be up front, doing 007 work, and you're not sure where *exactly* you're going to be in relation to the stacks, omnis are the way to go. Even in open taping situations, if you have a screamer or a loud clapper nearby, cards will hear them too. Don't be fooled by the TS propaganda that says the directionality of cards or hypers will reduce the crowd noise, it's crap 90% of the time. Those mics WILL help compensate for reflection, reverb and other stuff that you get from a bad room or crappy PA, but if you're in the impact zone of the sound it doesn't matter. Run omnis at all costs, in the face of danger up front. I have B3s, and if I taped metal I'd run them with one of the grids that give a high end boost, but since I record mostly Americana and jam bands, I'm happy with the flat grids. YMMV.