I have owned Jamo speakers in the past. They are good enough, but I don’t think that they offer particularly good value. If you have a deal on a sale, they would be worth considering.
Otherwise, I look around for a brand with a better price point.
But of course, if you listen to them and love them, they will be in the right price point for you.
There is a fella on this forum, named Carlos Medina (I think) who has done some extensive testing with MB Quarts, and was very impressed by them. I know MB makes some very nice car audio speakers, and I would imagine that a lot of their quality would carry over to their home speaker lineup.