Steer clear of the TeleVues - they haven't been updated in 20 years. The Binnotron 27 is pretty much the state of the art , and three people who I know use Denks swear by the Televue panoptic 24mm + the power switch as their eyepieces of choice. Badder Hyperion 24mm or Orion Stratus @ $180 locally ( same EP ) are excellent low cost alternative to the Panoptic .
Binoviewers can never match the bright pupil and richness of a true binoscope but they are worthwhile and give eyecomfort and a certain amount of presence in the view which you don't get with a monocular .
If you are on a budget the Baader Maxbright binoviewer with the 1.7X corrector designed specially for Newts is a good choice at around $560 USD , but you need to be aware of the infocus requirements - you may have to remount the primary mirror cell a little closer to the front and use a 2" extension tube of 35 or 50mm in the focuser when you want to go in mono mode.
http://www.alpineastro.com/Binoviewe...iewers.htm#ORJ
Just checked , you need 31mm free in focus to bring to focus with the 1.7 X Newt variant of the Max bright .
Hope this helps .
(if not to much trouble). 
