What headphones would sound best on the iphone 5 and home theatre listening?

Basically the best overall well rounded headphone for all purposes. I know these headphone I'm going to list are very different for different purposes but I assume there all superb sound quality. What I would be using it for would be to listen to music on my iphone 5 and outside noise wouldn't be that much of a problem. Just maybe a radio a couple people talking when listening. Other times would be using it on my computer at night to do work such as personal video editing, youtube videos. I'm also looking for good build quality that won't break when being tossed around a bit and of coarse I'd be careful with them. My budget $450 and heres the list

1. Audio Technica ATH-M50

2. Audio Technica ATH- AD900x

3. Beyerdynamic Custom One Pro

Thanks!

P.S. I'll also be getting a portable battery powered Headphone amp to give it an extra boost.

The only way to know which would sound best to you would be for you to listen to them all. If you're spending this much on a pair of headphones you really should try to find somewhere that'll let you try before you buy. What headphone amp are you thinking of getting?