Thanks for all your advice. Here is one review I found.
https://hyperbits.com/best-studio-monitors/Steve, your Focusrite seems like a one powerful interface. I have the Tascam 208i and called JBL tech support. Reached audio engineer Tony Smith there, a very knowlegable guy who spent an hour on the phone with me. He says that my Tascam should be able to do everything I need in the TRS world and the 305Ps are well matched for my room size and in my budget.
Do you use your interface with RCA-based stereo speakers or just with TRS components?