I've recently purchased the 24 Pan and 13 Nag and I'm loving the views. Instead of the XW10 my 10mm TeleVue Delos should be here in the next day or two. From recent reviews I've read they are at least equal if not better than the Pentax in specs and quality and $339 at Bintel at the moment. They also have the advantage of being parfocal with the other 2 TV eyepieces which means you can swap them over without having to refocus each time. A real bonus when you're upping the magnification on a fast moving object.
Something to consider.