Anyone Bi-amping with tube high & solid state lows

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

I am biamping my MG 3.5s with a Marchand 126s (Balanced I/O) active x-over. I am using ARC VT100 MKII for the treble/midrange and Kenwood L07 monoblocks for the bass panels. The results are incredible. Careful selection of output levels and x-over points and slope are required for seamless blending. In order to faclitate blending of the amps, I used a 6dB/octave @ 250 Hz slope for the high pass, whereas for the low pass I used a steeper slope, 18 dB/octave at 200Hz. In general, I would recommend a gradual slope for the high pass section and a steeper slope for the low pass (assuming that the solid state amp is driving the bass of your speaker).