Thanks a million rids, so if the 250Ohm's are 25:1 with the STX that's better than the 8:1 of the 80's? If I've understood you correctly?
yep, though as I said, they are not terribly sensitive to low damping factor so 8:1 would probably be ok. As you have no intention of using them on mobile gear you may as well go for the 250 ohm as they will have a very slightly tighter bass response compared with the 80's.
I can never resist paying for next day delivery - I've been spoiled by this place