If you're going to mix tube and SS, I think the common preferred scenario is tube pre with SS amp. Some folks think of tubes are being a bit smoother or rolled off in the treble, which can be the case, or may not be the case, but there tends to be that perception.... it depends a lot on the particular circuit and the tube selection. However, if you lean toward tube for the benefit of midrange and treble clarity and resolution that lets you hear through to the venue, I think you risk losing some of that benefit by not going with a tube amp to complete the amplification chain. The rest of the system will play a big factor in what gets revealed, and what mates well together. One of the virtues of using tubes is tube rolling to tailor the sound exactly to your liking.
If you're looking for bass kick or control from an SS amp, a powered sub is a nice option. I use one just to augment the bottom octave.