Earphone with crossovers are tricky. I find that it sometimes depends on synergy between your mp3 player and the crossover circuit 

I picked a pair of used UE700 up for $9.99 AUD on eBay which were in need of repair. Someone played a mean trick on the previous owner cutting the jack off with scissors. I soldered a new jack on (always fun with the tiny enamel coated wiring) and BAM brought them back to life. They sound really really good! Very impressed, I would lean towards saying unless my UE900 were faulty I like the sound signature of UE700 more.

@H2OFidelity: agree... I once tried UE900 and it didnt impress me, but then someone offer me his UE700. WOW... i loved it. the sq and comfort almost unbeatble for me. i ended bought his UE700 until my ue700 went missing... T-T
up till now, i still miss its comfort and forward mid...

I had a couple pair of these over the years - the 700 was an excellent job of tuning a TWFK driver - but in the end, the low frequency response, while punchy and accurate, was a bit light for me...
 
And the cable needs to be kept an eye on....

My first serious IEM's were the UE700. I thought WOW the models above them must be awesome!!!!!....LOL.
As I started to add to my collection they were listened too less and less. I eventually traded them away for another model and regret it still 7 yrs later, I love them but $245 as shown below in the Amazon ad is just too expensive...
Someday I'll find another pair.

I used to wear mine over the ear and i absolutely loved them. I purchased a pair that had the shallow nozzles at first and then bought a pair from Logitech direct that had the longer nozzles. These earphones made me believe in realy audio... I recommended them to a friend who later said he cried when he listened to some tracks!
 
I cannot find these anywhere and the places that do sell them are so damn overpriced its unreal. Still I'd buy them if I knew they weren't going to break.
 
The crazy thing is (and check this out if you don't believe me) the only thing I have found even remotely comparable are the SE535s. I know what you may be thinking, but side by side the only difference is the extended bass (slightly) on the 535s. And I shure as hell (ha, see what I did there!) am not going to shell out 400+ dinero on those...
 
My question is, well more a request - does anyone know of any IEMs that even compare to these gems?!?! Please suggest - I'd love to hear what you have to say