Oh man I gotta get some now....damm you Zepp!!!!!! LOL hehehehehehe 
LOL, I hear ya brother....I can't swing it now, but that's how I feel about all the Grado fans on head-fi who keep telling me I need some Grado PS1000s lol. The PS500s are my favorite "home" headphone, and I just can't imagine it getting much better in Grado land...but in a few months I'm going to give them an audition at my local dealer and see how they sound.
As for the 1350s, I think I have a decent feel for the type of sound you like, and so I'd say with confidence that you'd really enjoy them. In a blind listen, I really don't think people would realize these were portables without looking at them...seriously. Just a beautiful, full sound that don't need any extra ancillary gear to help them shine. iPhone, Kindle, laptop, iPad, you name it...you're good to go.