Hello,
I've used SMB connectors and like them OK. How do they compare to MCX? I'm making a board that uses a dozen of PCB mount sockets, and in my experience SMB sometimes require quite high forces for plugging/unplugging. In one case this destroyed a (commercially-made) PCB.
This is for a laboratory app but the cables won't be plugged frequently. Maybe (hopefully) not more often than 50 times during the lifetime of the thing.
robert