I use a Dino Baffetti black pearl 2 voice in D/G for barn dance work, its light and compact, solidly built and with pretty good responsive reeds, ideal for the job.
for morris dance playing you cant beat Hohner Pokerworks, the sound has never been bettered for this job, I have several in various Keys,
D/G, G/C, C/F Bb/Eb.)some with customised casework in various attractive woods, and better quality hardware.