I have the following:
- Sennheiser HD428
- UE 400vis
- Beats Studios (fake, from China, but IMO they sound better than the real ones

)
I also recently invested in some V-MODA M100s from the MS store after reading up on numerous positive reviews from audiophiles and websites alike. They're not cheap, but the design is absolutely fantastic, they're durable from end-to-end (Kevlar cable, full-metal construction, 45 degree plugs w/ detachable cables), fold up into a tiny hardshell case included and the sound quality is
excellent. I have been looking endlessly for a set of portable, over-ear headphones that sound good minus the amp; of course there are some better options at a cheaper cost (read: Sennheiser HD 598) but none that fit my bill. Highly recommended headphones.
If $300 is a bit too sharp, the V-MODA XS is $100 cheaper and has the same sound, design and durability except in a more compact on-ear form. My mate has the Sennheiser Momentum On-Ears and they're pretty nicely designed too (with the signature Senns sound signature). Otherwise in terms of IEMs the UE 600vis are pretty good for the price on Amazon (if you can deal with maroon as a colour), and in terms of cheap headphones, you
cannot go wrong with the Koss PortaPros.