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Good call on the XW Suzy! I was also considering a 5mm XW, but the price held me back as well. I eventually found a 5.2mm Pentax XL, which I use on Jupiter and small globs / planetary nebs. I had also tried the 6.7mm and 4.7mm ES eyepieces which I drift timed. The 6.7mm ES 82 is actually a 7mm EP and the 4.7mm ES 82 is actually a 5mm EP. Some will say that is splitting hairs, but it's not:
1200/5= 240x
1200/4.7=255x
1200/6.7=179x
1200/7=171x
The difference isn't huge but is is there. I found the eye relief to be too short on the ES eyepieces in the 6.7mm and 4.7mm focal lengths, so I grabbed a 5.2mm Pentax XL and the difference in relief is quite large. The quality in the glass of the Pentax XL's are much better than the ES eyepieces as well, but not a huge difference when viewing at the eyepieces. The ES 6.7mm and 4.7mm showed nice tight stars on axis and close to the edges, but the eye relief for me was just too short.
I have also owned a 28mm and 20mm Meade Series 5000 SWA which are excellent performers in fast scopes, (mine is a 10" F/4.7 Skywatcher Reflector), and these eyepieces are probably the same as the ES 68 degree eyepieces. (The guy at ES used to work at Meade....so IMHO, I think the Meade Series 5000 designs are pretty close to the ES designs).
Cheers,
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