David,
Either a Conrad Johnson PV-5 (around $500) or a CJ PV-ll (around $700) would fit your requirements perfectly. I have used both. They're both great tube preamps with a beautiful, lush, warm midrange; great on vocals. I think that the PV-ll is a little better on the dynamics (zippier?), while the PV-5 is a little more laid back. I'm talking a very minor perceived difference. You probably would be happy with either.
-Steve
Either a Conrad Johnson PV-5 (around $500) or a CJ PV-ll (around $700) would fit your requirements perfectly. I have used both. They're both great tube preamps with a beautiful, lush, warm midrange; great on vocals. I think that the PV-ll is a little better on the dynamics (zippier?), while the PV-5 is a little more laid back. I'm talking a very minor perceived difference. You probably would be happy with either.
-Steve