I've tried them all, and continue to look for new stuff as it comes out. I alway return to D'Addario, though. In the past I alway used J-16s, but I have found my 1970 Guild F50R (Jonathan Edward's old stage guitar) plays best with J-17s. Has anyone tried those Gortex strings - a bit pricey for me, so I haven't picked any up.For years I used to changed strings often to get that bright sound. I guess my ears have dulled, though, because I actually prefer the sound and feel after the strings have been played for several weeks to a month. I continue to play them until the are just to difficult to tune.