Tube Amp or Tube Pre Amp

For those of you who have experience with tubes, what would be your preference.

Tube Amp with tube preamp, Tube Amp with solid state preamp, or Solid state Amp with tube preamp

My system currently is Mcintosh MC352 Amp Solid State, Mcintosh C49 Pre Amp SS, Klipsch Cornwall IV speakers. 

I want to try tubes so with my current set up should I go tube amp or tube preamp?

Thanks