I have no experience with Vixen or Celestron eyepieces but have several TeleVue and some Takahashi eyepieces as well as the Masuyama 32mm.
What I like most about the Masuyama 32mm is the outstanding contrast and sharpness in f15 refractors. The optical design is dated but the quality of manufacture is up with the best. The 32mm has good eye relief and I find it very comfortable and relaxed to use.
It would not be my first choice for telescopes with focal ratios faster than f10. The off axis aberrations would be more and more disappointing as the focal ratio decreases.
The 16mm and 10mm are tempting but I really think I would not like the short eye relief for more than quick looks. I tried hard to like a 16mm Nagler type 5 but in the end the short eye relief was taking all the fun out of it.
