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The Delos longest focal length is 17.3mm. So not really around your 23mm range.
Other options? Vixen LVW 22mm and the Denkmeier 21mm. Both have 20mm of eye relief and both are 65 degree's FOV. Both are excellent.
When your moving down the focal range. i.e. 20mm and less. The Delos are superb. They are move favorite eyepieces range. Excellent field correction and contrast. A nice neutral color tone. Excellent light throughput.
Since you said 10mm and 5mm. Also consider the Pentax XW series. They are cheaper then the Delos line (just) but are fantastic eyepieces. The Pentax XW 10mm may just be the finest 10mm eyepiece ever made.
That being said if I was going to do it again all again I would have bought the Delox 10mm instead as I find the Delos line more comfortable to use. (The Pentax eye cup tickles my eyelash when I roll my head a bit to focus on objects towards the edge, where the Delos doesn't)
YMMV
I'm actually looking now to get either a Vixen LVW 22mm or Denkmeier 21mm. Initial reports indicate the Vixen LVW has better edge correction in a fast newtonian so I'll probably go with that.
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