"Randy Given" wrote in message
news:a14nd.3$HE2.1@lakeread05
Arny, excellent stuff and I was hoping you would reply!

I'll take another look at the plugins, but since this is to be a pair
that three people share from time to time, I know they won't want to
share plugins. I haven't had a chance to go out and try these, I hope
to this weekend, but compared to the Sennheiser 580s, how do these
stack up:
+ Sennheiser PXC250 (noise canceling)
+ Sony MDR-V150
+ Sony MDR-V250V
+ Sony MDR-V300
+ Sony MDR-V600

I have no experience with any of them. Oh, I guess I've heard the MDR-V600
which are reputed to be the current version of the MDR-V6 of which I had
two pairs and wore them out, and they are therefore cousins of the MDR 7506
which I still have and use all the time. The MDR EX-70 and 71 (The 71 has a
different cord) have a similar but nothing like identical sound quality to
the MDR 7506, to my ears.

In-Ear-Monitors, which is the formal name for what you seem to call
Plug-ins, have considerable inherent reduction of external noise. My
experience with actual noise-canceling earphones is not good.

BTW, there are some noise-rejecting versions of the 7506s
http://www.trewaudio.com/hn7506.htm .