Your Parasound amp has the power and control you need, so what about simply buying a decent tube preamp. It'll probably do what you want and cost less than a good 200 Wpc tube amp...
Which SS amps sound like a tube amp?
I'm doing research to find a new amp to replace my Parasound HCA 3500. I'd like the tubey midrange but the virtues of SS in the bass. Biamping is not an option as my rack is quite full. I need at least 200 wpc and want to spend less than 2k used. I'm driving VMPS Supertower/R SE's. Any help is appreciated. Thanks