I just ordered the GR04 "Flagship", if these don't sound the way I want either, I'll jump straight to 100$, the Shures sound really nice compared to budget iems I had so far, they sound like headphones, sound has body, it's not thin like on the AM-90, bass is good, not too much like GR02, and not too litlle like AM-90, mids are very good, they sound natural, not too forward, not laid back, the highs are good also, not very bright or extended, a little laid back and early roll off, this would be the only minus from my point of view, but overall I found the S215 fun to listen to, dynamic.
I listen mostly to rock-pop (pearl jam, led zeppelin, queen, genesis, aerosmith, dave matthews band, pink floyd but also roxette, police, sting, toto, alan parson and many many others) dynamic music with lot of instruments, good recordings, mostly good remasters, lossless format, on sansa clip+ rockboxed, I can say the source is very good.
I know that with the SE215, I won't hear dust particles falling on the cymbals while the band was playing, but I found them fun to listen to, I even turned up the volume more than I used to, i guess that means they are non-fatiguing (or I wansn't hearing things right?), it's the closest thing to what I'm looking for until now.. maybe someone with experience understands what I'm saying and could recomend something better for me whithin SE215's price range, i love bright but fine, sweet sound, not agressive, highs must be present but not shouting, SE215 is a little dark but everything else seems fine..
Now I'm waiting for the these GR04, I hope it has better mids and more refined, less fatiguing highs compared to GR02, it would be perfect..