I've used the M5 Sloop for two years
I own several Cabasse models, including the M4 and M5 Sloops
I am surprised to see this review giving M4 more stars than the M5
Indeed they are very close to each other, but the M5 delivers more bass and a bit more presence than the M4 ... {comparison made with same amplifier, in same auditorium, even same setup }.
Quality price ratio: the two models are an excellent choice ...
With this experience would you again choose these models ... Yes of course in this price range and in the same categories.Of cousre  there are other models like the galleons or Yawl but they are in another world, and the budget is no longer the same.