First off, I was looking at the buying guide by price range ( http://www.head-fi.org/wiki/buying-guide-headphones-by-price-range )
I am looking for a cheap-ish IEM for general use, gym and so on. Currently using PL-30 with my Clip+, occassionally with a cMoy (I am going to get a E7 soon, since they are very cheap on www.dealextreme.com (I assume they aren't fake?)
Going by that buyers guide it seems the PL-50 would be the logical choice as it seems they are even comparible to the IEMs in the price range above too?
As far as my tastes go, I would be listening to jazz, classical, hip hop and trance. So the RE0 wouldn't really be applicable as "male vocals sound slightly sucked out or recessed", which would be a great disadvantage for hip hop. I like a good sound stage, but understand I won't get anything mind blowing for this price range.
I live in New Zealand so would have to buy from somewhere willing to ship here.
To summarise, I am looking for a lowish budget upgrade from the PL-30, but am unsure what to look at or if there is anything that would provide a decent gain up to 100USD.