Vsonic GR07's would be worth looking into. They get quite a bit of love on this site and are supposed to punch well above their price point. I don't own them myself, but I've owned the Vsonic GR06, which is the GR07's little brother, for several years. The GR06's have been absolutely fantastic IEM's that I still listen to occasionally, even though I have much nice headphones now. I imagine that the GR07's would be even better.
It might be a little close to going over budget, but you could also look at Cosmic Ears BA1 if you're interested in custom molded IEM's. You'd have to wait a while to get your IEM from them as they're based in Sweden and they have a lot of orders, but they make fantastic CIEM's. I own their HY3 headphone and it's awesome!
Food for thought.