Sound too bright
OK, first, I do can tell a difference between 192KBps and uncompressed. My primary setup is Musican Fidelity Can + Sennheiser HD600. However, I didn't like Shure at all. Sound is too bright, basically it is like solid state vs. tube sound. Shure sounds way brighter than Sennheiser. Maybe if you are a Grado fan, you'll like them. I actually like sound of cheaper Bose TriPort better (OK, you can flame me now for mentioning Bose and audiophile in the same sentence). I am returning Shure, continue looking.

I miss my Shure E4c!
Left my E4c on a plane. You are welcome to whoever picked them up! I like the noise isolating for riding a bike as the wind noise makes any other listening options impossible. The SE310 is great when stationary. A perfect fit is mandatory. "Bright" would seem an appropriate term. My girlfriend was unable to get a fit and scoffed at the expense.

My largest complaint is the MASSIVE connector mid cable. Where the Y terminates into another jack leading to the beefy male connector. It weighs as much as my ipod. On a plane, no big whoop. On a bike, in the gym, on a jog: huge issue. Even when used in the over the ear fashion the weight tugs on the earpieces, upsetting the perfect fit and losing all mid and bass.

If you can find a pair of E4c's buy them! Light and great fit and sound. I would buy these only for physically inactive options. The sound is superior, but for me less functional.

My early new year's resolution is now to stop destroying packaging so I can return products that I am not happy with. My solution was to buy Ultimate Ears Super.fi 5 Pro Earphones. Recommended, however have required two RMA's.

Aural Nirvana
First let me say that I bought these because I was in idiot and carelessly destroyed my other pair of Shure headphones. But, I will come back to that.

I spent a little more than I wanted to. I knew from previous experience that Shure products were fabulous. And I was not disappointed. I don't make a move without my Shure headphones. I would be horrified to find myself at the airport without them. I won't get into all the technical reasons they are superior. I will just say that they are without peer.

Back to me first pair. They got destroyed through my own carelessness. 100% my fault. I took a chance and sent them to the Shure repair center with a copy of the receipt, and a copy of the receipt for my new pair that I bought on Amazon. 7 days later a brand new pair showed up with a zero charge invoice. Now, that is a company that I will come back to again and again. THANK YOU Shure!!

My advice, buy the most expensive pair you can without getting yourself in fiscal trouble. You will not be dispointed.

Excellent product
Sound quality is truly impressive and that's all that matters. My only gripe is that cord is too short for any meaningful use. There is extension cord supplied but then it becomes too long and starts to tangle.

Shure SE310-K heaphones
Ordered in Maastricht (Netherlands, EU) and received within 3 weeks on the first day of the estimated day of receiving the item.

Sound quality of the headphones are good, but lack a bit in bass-response, especially in electronic music like trance, house, techno and dance and hip-hop. All other sounds are great, like guitars, piano, violins and voices.

Worth the 200 dollar.