I've owned a MMF 7.1, the Concept, and a Clearaudio Emotion (very similar to the TT-15).
The Concept was a really nice table but super sensitive to footfalls. Didn't work with the springy floors in my house. Shouldn't be a problem with cement floors.
Not sure what makes you think the TT15 is hard to set up? My Emotion was easy enough to set up. A little fussy in terms of keeping the motor in place, belts coming off, and grounding. The Virtuoso is really good, but not as good as a similarly priced cartridge like a Hana SL. And it's really easy to break of the cantilever.
The MMF 7.1 is solid, not fussy, well isolated, and can sound really nice with a good cartridge. That would be my recommendation of the ones I have experience with.
I would also recommend the Mofi deck. I've spent some time listening to one and found it very engaging and it didn't seem to be fussy in any way.