Well, I never got to test out the U87 last night anyhow. Was tracking on tape and was having problems with the tape machine (wouldn't engage FF or RW, had to rewind tape manually at 3:00 am to get the vocal track... thank jah he could sing).
I've been hearing lots of good things about the SM-7 too... thats been on my radar as well. I think Guitar Center carries the 4033 and the SM-7, so I could probably try them out and return them (I think the return policy on mics is 1 week?) but I'll check it out this week.
And you are right on the vocal booth, Im tracking vocals in my live room making a little booth out of Clear Sonic's Tall Fabric panels... not the greatest solution.