Hopefully, he found what he was looking for in the meantime... ;)
Now,
Quote: I tried using a Studio Projects c1 mic, highly touted, but the room reflections it picked up made me sound like a barrel singer
To avoid that sort of problems there are solutions like
SE Electronics' Reflexion Filter (I think there are similar systems made by other manufacturers but it's the first that came to my mind). It only aims at killing the room reverb though, so it won't cut the ambiant noises (computer fan, noise from the outside...) if that's where the problem comes from. And, apparently it's also pretty heavy... But if it can work I think it's always preferable to use a condenser mic instead of a dynamic (like the Shure) when it comes to recording voices which details and nuances are supposed to matter, which I assume was the case for mmcguire since he mentioned that he's a baritenor.