Wait until the speakers have a few hundred hours on it.
Last night I was listening to Kind of Blue with the Magtech and the LRS+. For the first time I felt like I was listening to a live performance of this album.
The LRS+ is incredible. I do think my LS50 Meta was a bit sharper focus (not imaging). Whatever, the case, the LRS+ is the lowest in the Magnepan lineup so likely going up the range gets the sharper sound I heard with the LS50 Meta.
I think the LRS+ is better than the LS50 Meta. My criticism was just some very minor issue. I have no plans of going up the range of Maggies (for my office) since the LRS+ fits so perfectly in my 12x11x9 room (with 4 additional feet of closet space with a desk).
I hope you can pair the LRS+ with your JC1's and give a comparison.