Thanks guys, I've finally ordered a 662 F. It should be here in 1-2 days, so maybe after some burning-in I'm gonna post my first impressions here. :)  

Hi guys!    Which Superlux do you recommend for PRODUCING rock music, so monitoring instruments, editing music AND recording vocals without sound leaking? I was thinking about the 668B for a long time but than I realized that for clear vocal recordings a closed headphone would be a better...