I have both tube (Manley Chinook, Jolida JD-9) and solid state (Musical Surroundings Nova Phonomena) phono pre-amps.
The size of the units may be another factor to take into consideration.
The Phonomena takes up less space than the other units, but on the other hand I can stack a turntable on top of the Jolida. There are of course some very small tube units like the Project Tube Box and large solid state units.
I leave my Jolida JD9 on most of the time by the way.
My space is limited and size and form always play into my decisions.