Magnapan LRS+ VS .7

I have the LRS+ running on a Rogue Sphinx v3 in a small - my home office- room that's about 10x 12. I have them about 2 feet from the rear (on the 10 ft wall) and only about 1 foot off the side walls. I have them on the factory stands, slightly tilted back and barely toed in. They sound great, There's no treatment behind them  except a curtain that covers a window thats centered on that wall. The Rogue drives them easily and if I want to crank them up they get plenty loud. I roll my office chair to about 8 feet from them and they're fast, musical and dynamic. For the $1300 or so they cost I think they're great. I've had the wireless powered KEFLS50 with a JL E110 in the same room previously and these just work better. I'd say go for it, its a small investment in a really well reviewed speaker. I don't bother with the ASR reviews- at all. My main system is Wilson Sasha 2 on a Pass 250.8 and a JL f113 V2 in a  dedicated room and I've had a ton - a ton- of equipment in and out of the systems over the years. 

I that size room I would recommend the LRS+.  I found them to be a great introduction to what Maggies provide. 

I own LRS+ and I think I could make them work in most rooms.

They are fantastic speakers for the money, they do so much very well, even the bass that they do have is done very well.

For my room of similar size, Magnepan told me the LRS+ would sound better than the .7 ...

20" from the back wall isn't going to be enough I'm afraid... you need to get them out another foot at least. Although I liked the .7 much better than the LRS+ (and better than the 1.7i!), I think in your space anything larger than the LRS+ will be darn near impossible to even "make it work"