Well most peeps have DCs because they are nice, comfortable and very rugged.
Look on ebay and you can buy a good set often a lot less dosh than a new one.
I recently picked up an ANR DC13-10 for only £250 and when I received it, it was boxed and as new, working fine.
Cusco, I respectfully disagree with your comments about the ANR bit. It does not cancel out odd noises just the boring and straining ones!
However the noisereduction of the passive is so good that you can wait spending the money on the more expensive ANRs until you start doing longer trips. You can then relegate the passive ones to the backseat drivers.
FD