I owned most varieties of ES eyepieces ( 52, 62, 68, 82*) and have sold then all after trying the Televue equivalents. TV just works better for me. I even swore off of the 82 line after using the ES as the lens design did not allow me to view the FOV without putting my whole head on a swivel. Then I picked up a 13mm & 7mm Nagler in a package deal, thinking I would just pass them along and boom! what a difference there was in the view. The TV eyepieces allowed me to take in the whole FOV without the merry-go-round exercise. The Radians still offer a much clearer view than the newer 62* line from ES. The closest parallel for me was the 24mm 68* compared to the 24mm Panoptic, both were equally impressive, and for me the reason I sold the ES was the smaller form factor of the TV. That being said, The Delite line at 62* is very impressive and the Delos at 72* is not far behind. The Ethos are magnificent but you might have to take out a second mortgage to bring one home.
Considering your current lineup, I would say the Delos would be very impressive to you but the focus travel would be very different on the dob, and the weight difference could cause an issue on the 4". This wouldn't be a proper CN response without throwing in unsolicited comparisons/suggestions so here they are:
Delite 15mm or 18.2mm
Nagler 9mm ( compare to your 8.8)
and coming in from waaaaaay out in left field... Baader Morpheus 14mm or 17.5mm
Edited by Grounddweller, 04 December 2020 - 08:55 AM.