I had demo of Ref 3 metas, r11 metas and ls60s recently.
All good and similar sounding in many ways but of course each radically different in physical construction.
I liked them all very much!
Main appeal for ls60s would be conserving space, cost, especially at current price, and overall value. You get a lot for your money. They are all-in-1 design of course, overachievers in terms of sound quality for their size and relatively easy to handle, set-up, and use.
Ref 3 metas were exquisite sounding. The other two were both pretty close.
I run ls50 metas + sub currently in a smaller room and that combo can compete quite well up to about 90db SPL or so, which is all I need mostly these days.