As the title says, how do the Blox M2C's compare to the HIGHLY regarded TM5s and the Yuin OK and PK series? Are they comfortable? How do they sound? I don't expect much isolation, but is there some?

Hi guys, I'm looking to buy a portable headphone. Currently I'm using the Sony retractable clip-ons for my iphone. They aren't keeping the outside noises out and the left one is crumpling up my ear a little bit. I do have a Beyerdynamic DT770, Sony MDR-v6, and two headphone amps, a fournier...