I play blues a lot. I am all over the bass and need nice mellow lows on the B and loud tones on the G. Ibanez Sr 505 and would not trade it for anything. Peavey Tour 700 amp with the sounds coming out of a GK 4x10 and a Peavey 1x15. What tone changes will flat strings make (I never used them) or any suggestions on different guage strings