I have a pair of 20-10XL's. In fact I've two pairs now, having recently bought another for pax's.
I think they are excellent (evidenced by the recent additional purchase). They have much less claming force than the other DC models, and are quire comfoy. The headband refered to above is a little unusual, but I haven't found it a problem....just a matter of setting it up right in the begining.
My only caution is that fact that you're not getting the Electronic Noise Cancelling set. The passive noise reduction isn't bad, but there are probably better passive noise cancelling headsets out there....probably not as comfortable, but quieter. With the ENC, they are excellent, but expensive.
dp