Oddly enough, someone on anythingbutipod forums made a comparative review of the sennheiser CX 300 and v-moda bass freq.
http://www.anythingbutipod.com/forum/showthread.php?t=35322
After reading that review, another one in the same section of the forum and this one from headroom, I chose the cx300 (however it was also because it was much easier to find them in France).
