Anyone Bi-amping with tube high & solid state lows

Gain problems for u,94db ,2 watts and 200+ on the woofers you are going to have gain problems ,94 db would be better to run a 300b or so[8+ watts] 2 watts will not work for you unless its only back ground music in a small room ,94db works out to only 97db 1 watt 1 meter so only low 90s available at the listening position .If you buy the 2 watt you will be selling it on the gon soon .Happy listening JK. PS 3.5 watts wasent enofe on my 103 db horns

Johnk makes a good point. If you can, BORROW a low wattage amp to try before you buy.

My Parasound has gain control knobs on the rear panel. Will that help with the gain problems?

Also, what do you think would be a minimum amount of power for the mids & highs in my setup. There's another company that makes a pair of SET monoblocks that have 12wpc and it's within my price range. Would this be a better option for me?

Gain controll isn't a bottom line here.
The gain should be controlled dynamically unless the amps at the top and bottom end have absolutely identical characteristics.
To controll gain dynamically you need an active crossover and remove built-in speaker crossover.

I think you would need arround 8 watts plus so 12 would work great .hope this helps I tried much gear to get a great match .JK