Hi Glen, get a toucam or neximage and you'll never use an eyepiece again
Ok, maybe that's just me. "Xreckor" - Rob Charteris - has a few XW's and speaks convincingly and passionately as to their merits so he may be the best to comment on these. One caution though is eyepieces will perform differently in your SCT compared to a newtonian like Rob's.
I wonder about how well any one eyepiece can excel at different tasks, though it depends I guess on one's expectations. If it were me interested in both planetary and deep sky I'd get the one high quality, high cost, wide-angle eyepiece like the XW that achieved medium power ~120-200x for use in deep sky and some lunar/planetary, and supplement with UO eyepieces (which for $80 to $125 for the HD version are good value). I use the 18mm UO HD as my starting eyepiece for planetary and lunar - used in C9.25 like yours and a slightly shorter focal length 7in dall-kirkham cassegrain. The 18mm provides a good starting power to sus out the seeing and sometimes may be as high as you want to go anyway. These eyepieces should be fine for smaller deep sky objects, eg planetary nebs etc too though I haven't used them for such.
hope this is of some value.
cheers