I would like to add that good eye relief whilst normally only a consideration to eyeglass wearers can also make for very comfortable viewing for non eyeglass wearers. I would highly recommend the Tele Vue Radians (now mostly discontinued but can be bought used).
I would also seriously consider the Meade Series 5000 HD-60 Eyepiece Set #07736 in lieu of the 4000 series set for better eye relief. It really does make for comfortable viewing and you get 60 deg apparent field instead of 50-52 deg of Plossls.
There are other makes of eyepieces with good eye relief available. Edge correction is where the extra money goes into and it also depends on what telescope you use the eyepieces in as to how good or bad the edge performance is.
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