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Hey Phil. Ethos is the reference eyepiece in the 100-110 degree FOV class. They are optically superb, so the decision might be whether you like the combination of the 15mm eye relief and a huge field of view where the field stop is difficult to see.
Delos and XW are the best eyepieces you will buy in the 70 degree FOV class. I think the Delos are the best eyepieces TeleVue have made. Optically I find them a hair better than Ethos and the ergonomics are very nice. I can take in the whole field of view with the comfortable 20mm eye relief. There are not many better choices in the mid to wide field range and they would all work very well in your scopes.
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