i'm a regular nickel string user, but the sadowsky and d'addario nickels dont have enough grind for the more rock gigs i've been of late. but, along with my granny-butt back that i've pampered w/ neo loaded speaker cabs and an uber lightweight 15 lbs. amp head, my fingers like to be spoiled as well. so, any suggestions on an aggressively biting steel string that's also easy on the fingas? i really liked the sound of a friend's jbass strung up w/ rotosounds, but after an hour of play, my fingers were pretty chewed up. also, my trusty MTD635 with its MTD steel strings, while awesome in their midrange thickness, pretty much nubbed my fingers to torn up stumps. anything similar yet not as gnawing?