Yea, I'm thinking the 3070 is probably fine, I don't have a huge room either. Anything else is probably overkill for my room, and I have upstairs neighbors so I can't blast it super loud. I mostly wanted to have a class A/B amp, but it sounds like the 3070 is A/B so that's good. I used to have a old Onkyo Pro Logic receiver from the 90's that sounded better than the 8 year old mid range Onkyo I have now, since that one has class D amps.
The outlaw monoblocks you mentioned might be a good option, if I really want to upgrade later, or the Monolith amps.