gotcha.   thanks.   which ones should I be looking for ability to monitor my DJ mixes/performances as well... (so not just for ipod listening)?   what should I be looking for in terms of specs?

I've seen them priced between $1,000 and $2,000 and now I see JHAudio's lineup and they go from $400 to $1,200:   http://www.jhaudio.com/collection/jha-pro-music-products   Is the difference between the JH5s (on the URL above) and all the more expensive models really that noticeable? I...