The great thing about bino viewers is that they feel like they're presenting a wider field than they really are. I'm a sucker for 82° fields (or larger) in mono, but I find plain-Jane-52° fields fine with a bino.
I still prefer mono for most dim targets. But I get the bino out for the planets and the sun. Doubling the eyepiece collection isn't quite so painful when you do it with Plossls instead of UWAs.
Anyway, most used for DSOs are Naglers 26T5 and 17T4, with the 12T4 close behind. Most used for planets and solar are pairs of 15, 20 and 25 TV Plossls (with a 1.7x glaspath compensator).
Cheers, -- Jeff.
-------------------- Nikon 18x70s / UA Millennium Colorado:
Solarscope SF70 / TV Pronto / AP400QMD Coronado SolarMax40 DS / Bogen 055+3130
APM MC1610 / Tak FC-100 / AP1200GTO Tak Mewlon 250 / AP600EGTO