Mixing SS and Tubes

I'm thinking about getting into tubes and have read threads about mixing SS amps with tube preamps. What about the other way around? Are there any advantages (or disadvantages) with mixing a ss preamp with a tube amp? I currently have a MAC MA6450 which I was thinking of using for the preamp side and then getting a reasonable tube amp to play around with. If this is worthwhile, any suggestions for the tube amp (< $1000) would be appreciated.

Thanks!