The DN-1000 is a great IEM but a little over your price range. If you are ok with buying used, here is a pair for a nice price.
I'm not sure if it is still available though.
It doesn't really matter about the type or how many drivers that much. I would recommend the RE-400, Alfa Genus, AX35 and maybe the H100. It would be better to go and read some reviews on these to get an idea of what the sound like.