In the next few weeks, I'll be doing a combo video/audio recording of myself singing opera arias with grand piano accompaniment. The room is an open choir room with nice but not excessive reverb. The only mics that I have available to me (without shelling out) are SM57's and one beta 57. I was thinking of just recording a stereo image with two mics, but I'm not sure if I can make the 57's sound good because I will need to be at a distance from them to capture my voice mixing with the room. Digital reverb is not an acceptable option because the audience for which I'm recording may consider that "cheating". I will be using a Tascam US-122 to send the mics into my computer. It only has two inputs, and the preamps are acceptable but do get a little noisy when they are all the way up, which I may have to do if I use the 57s. I'm willing to spend a couple hundred if I have to, but I'm not sure where I should focus. Mic placement? Better mics for the context? If so, which should I consider?