cheap headphone + sound card

[Massimo Grassi <massimo.grassi@xxxxxxxx>]

Dear list members,

(apologies for the 100th technical question about headphone and soundcards)

- I need to buy 30 headphones for our computer room. I was looking for 
something cheap (say less than 30-40 euros per headphone) but 
(hopefully) not as bad. Any suggestion is welcome. (I remember a recent 
post with a similar question. I looked for it in the archive but I 
didn't found it.)

- I'm about to buy a sound card for the psychoacoustics/crossmodal 
perception lab. I was targeting a USB M-AUDIO (i.e., Fast Track pro or 
Fast track ultra). The idea of the USB was that we may move easily the 
sound card if we need it. Does anyone have experience (good or bad) with 
these soundcards? Is there any reason why I should avoid USB cards (or 
these two in particular)? Is any of you aware of temporal delays of USB 
sound cards when they are used together in synchro with visual stimuli 
(e.g., stimuli created with the psychtoolbox for example).

Any suggestion is more than appreciated,
m