This is from memory, I may have missed something. I have a binoviewer (Denk Standard) so I may have more eps than average (but I'd bet not).
40mm UO 2" KonigII MK70 (a fave) 8)
32mm Celestron Ploesel (x2)
26mm Meade 4000 (japan) (x2)
25mm Celesron/Vixen Ploesel silver top
25mm Homemade Erfle :S
19mm GRO 2" Super Wide :S
9.7mm Meade 4000 :S (not enough relief)
8mm Celestron X-Cel (x2)
7mm Celestron/Vixen Ortho :S (not enough relief)
5mm GTO LER Superwide :S
2.3mm Celestron X-Cel :S
12mm Radian is next on my list to buy. Do I really need two for my binoviewer?

Less expensive EPs seem to be OK with a binoviewer, I notice less difference in the binoviewer than when used as a monocular. Is it just me?
PS I have two SCTs and a Refractor, thus more EPs and I am in the process of deciding on power and field, then upgrading on quality. Eye relief is a huge issue, I wear eyeglasses.