Two weeks ago we setup a 20 inch Dob and used both the Denk 21s and the new Denk 14s and the views were absolutely phenominal (now I have to get a 20 inch dob to go with my eyepieces)... there is also a thread running on CloudyNights that is echoing my sentiments regarding the denk 14s.
http://www.cloudynights.com/ubbthrea...sed/sb/5/o/all
Again, these are sold as pairs for binoviewing, but we swictched between mono and binoviewing and the views were great. These are high quaility eyepieces worth considering.