IMO, it's better using eye pupil rather than magnification because eye pupil determines brightness of the image and magnification is a dependent aspect. The step of 1.4x between 14 and 10mm isn't too small, IMO.
Actually, three eyepieces, that give you eye pupil of 1mm, 2mm and 3-4mm (focal lengths 5mm, 10mm and 15-20mm) will cover most of your needs. You've got one of them (14mm - 2.8mm eye pupil), so you just need two. And I like Mark's suggestion on Pentax XW or Delos. You may need the 10mm and 5mm XWs or maybe even better the 10mm and 6mm Delos, because the 5mm XW can be too much for most of the nights. And if you have a good 2x telecentric Barlow like ES Focal Extender or TV Powermate you can get two additional eyepieces, 7mm and 5mm, by barlowing your 14mm and *future* 10mm.
As for Pentax XF...well, eyepieces are a kind of subjective AFOV included...I was on the fence a couple of months ago trying to decide between the 8.5mm XF and the 8.8mm Meade UWA...and I decided on the latter. I already have the 14mm UWA and after looking through the 82*AFOV I just can't appreciate the 60*AFOV, especially when observing open clusters. My minimum for DSOs is 65*AFOV and I wouldn't want anything narrower than Pentax XL. But it's just me, YMMV.
Edited by CeleNoptic, 17 August 2014 - 10:32 PM.