I play jazz and 1950's Chicago style blues and so like the thick, round, mellow tone produced by heavier gauge strings, made of pure nickel. The set I use to string up my Telecasters and Gibson iollowbodies is D’Addario's Pure Nickel EPN21. They are gauged .012 - .051 with a wound G. They come in gauges from .009 - .013. Flatwounds are an obvious choice as well, particularly for jazz. I've tried them from time to time and they never feel quite right under my fingers. Link below... http://www.daddario.com/DADProductFamily.Page?ActiveID=3768&familyid=4 Their Nickel Bronze strings sound very nice on my acoustics. And BTW, I have no affiliation with D'Addario in any role or capacity. I just like their strings.