My main system is still 5U - mostly MOTM, with some MU.
Last year I made small company based on teaching DIY (aisynthesis) and those modules are all euro at the moment, but I do long to offer 5U and hope that 2017 is the year for it. I just need to find a good source for making the panels.
MU seems to have a larger market than MOTM at the moment, but it's much harder to make the panels.