After having my RS1i for a couple years now I still think there's either something wrong with them, or with me. The bass is so rolled off I can't bring myself to use them for any kind of rock. They do sound lovely with acoustic music and folk, but anything heavier than that is flat and unsatisfying. I really hope to hear another RS1i one day, just to check if it's just my pair, as everyone else seems to love with them with everything!
try them with flats, you won't be disappointed if you're looking for a thicker sound with a better low end