I've read a dozen or more threads in the Headphone forum, but its still a bit confusing, and i do wonder what headphones work with the PSP specifically. Requirements include small form factor (for carrying/storage), cheapish (<£30), improved aural experience, preferably w.r.t. external noise and compatibility with the remote thingy and obviously PSP itself. Usage is 99% seated, but something better for airplane/traffic noise would be good. Suggestions and research seem to indicate: - Sennheiser MX500 (550 or 400) - Sony MDR-ED21LP - Sony MDR-EX81SL (potential wire problems?) - Panasonic RPHJE50 Anything else? choices amongst those?