Which one is the best buy (*pics below): an used 2115 (200w) or a new Kickback15 (120w)??? The first one would cost a little bit more. 2115´s pro: more wattage. Kickback pro (?): you can use it on that "kickback" position. The wattage difference would make any real difference? Use: rehearsal, small gigs. I play blues. I´m from Brazil. Thanx!