FMT, we have the exact same tastes in music, and i thought the e500s were horrible. the roll-off in highs results in non-existent treble. the "sparkle" of electronic sounds is entirely absent. secondly, the e500's bass is too boomy, so think of house music where the entire song has a bass line...it's just....BOOM, BOOM, BOOM, BOOM, BOOM, BOOM...maybe you like that, but for me it was distracting and took out all the enjoyment of the song.
the triple.fi's are different but i didn't find them worth their price at all. they definitely have treble compared to the shures, but i found them to have a little bit too much. felt too sharp, too "metallic."
can't really make a suggestion because i never found what i thought was a great IEM...personally, i wouldn't waste any more time on them unless i could afford a pair of UE-10s or 11s.
good luck, let me know if you find a pair you love.