Joe,
The 14mm Denkmeier is the outstanding eyepiece with long eye relief at this focal length. I have used this eyepiece in binoviewers and in single mode and they are exceptional. At least the equal of my 14mm Pentax XW. To be truthful, if I was starting from scratch and didn't own 4 other Pentax XW's, I would probably take the 14mm Denk over the 14mm Pentax XW. I rate both of these fractionally ahead of the 13mm Nagler which does outdo them both in AFOV. The 14mm Denk has a 65 deg AFOV as opposed to the 70 deg you are after, but I think that is splitting hairs. The AFOV is the same as the Vixen LVW's and "almost" the same as the TV Panoptics.
These are sold in pairs specifically for binoviewer use. Contact Daniel Beringer at Frontier Optics if you wish to support a local supplier.
http://www.frontieroptics.com.au/
If you wish to "maximise" the FOV, you can't go past a pair of 13mm Nagler T6's.
Cheers,
John B