BK7 had all the lead sounds I wanted. Very good guitars, horns, organs, sax and drums. Piano o.k.
I liked it a lot, but too much plugging in and setting up, with laptop, controller keyboard, external screen, vocalizer, mixer all essential to what I was doing.
The setting up of two units is the drawback but if you want the ultimate I guess you have to sacrifice something. As for the BK7M sounding old I really don't understand. How much better do you need for gigs? People don't listen that intently and my BK9 (same sounds) is doing a great job.
Chasing the next best thing has gotten real old for me after all these years of playing.
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer