I just upgraded to a Neumann TLM103 mic and now I want to get a better preamp to go with it. I have an Art Tube MP preamp, which sounds better than my Mackie pre’s. The most important thing for us is to get a good sound for female lead vocals, as my wife is the songwriter and generally sings the lead. We’d like to keep it around the $500 range if that’s possible, while still getting a decent sound. Any suggestions are most welcome.