I don't perform outdoors but had the BK7m for a month or so in my home. Personally I thought it was a nightmare really. I have to admit that I have shied away from Roland over the years though having said that I even gave the good old G70 a go last August.Getting back to the BK7m, I think it is a nightmare to program and program you will have to as few people , if any, have programmed any decent registrations/user programs/performances. I am currently encountering a similar problem with my latest acquisition the Ketron Midjay Plus which I bought secondhand. Apart from its typical Italian erratic approach ( sta zitto Andrea I like it a lot and although it needs drastic progamming as well I prefer it to the Roland. The Ketron Styles ( and it reads them all up until and including the SD5) are much more band/live styles than the Roland ones. And the Ketron works quite well with my PA800...
Due to the fact that Ketron has just released the new Midjay PRO module which is quite expensive and bug-ridden there are quite a few secondhand Midjay Plus modules on offer, in particular in Italy, where I bought mine.....
Personally I would never use a module for live performing but rather have two arrangers/workstations if necessary but then it is easy for me to say as I do not perform outdoors.

regards,
John