So I broke my cheap pairs of sony, and now I need a new pair, I've only ever ventured and tried around with stock apple, junk beats, and I was thinking of splurging a bit and buying better audio equipment. I'm looking for something durable, comfortable and still able to sound amazing. I plan on using these outdoors, or while working out. So far I've looked at ATH-CKS99i, ATH-CKM500iS, House of Marley EM-FE003-MI and UE 600vi. I've taken a look at sennheisers but I'm not sure if they're any better than Audio-Technika's. I was also looking at sony, but I'm indecisive. What do you guys think? 

I currently own Audio Technica Solid Bass IEM and I previously owned Sennheiser CX II Precision IEM. Personally I think the Audio Technicas are better than the Sennheisers in terms of overall quality and of course bass since thats what the Audio Technicas were designed for. I am new to the headphones scene as well so I can't really go into detail.