CAJUN ACCORDION DISCUSSION GROUP
For the 10 button side I used a clip-on Audio Technica ATM 35 and for the bass side a Shure SM57.
This combination worked well for Cajun.
Shure , AKG, Samsom, Sennheiser and other brands make good mikes too of course.
See website link#2
I don't know if the wireless option is better ?
I also have two accordions with internal heavy weight microphones :-)
Grooming noisy sound ;-)
Further there's quite some information on this forum too and on the website from Big Nick is
also some knowledge about that.