I have a chance to hands-on the Kowa top-of-the-line Prominar TSN884 straight view spotting scope ( in Shangai, where I am now residing in ). It is a great scope. Sorry I did not have a chance to do a A-B comparision test in the field, with my 85T*FL.
Kowa do have a lot of accessories and adapters for use with (different brands of) DC for digiscoping purposes. The TSN884 is more expensive than the SWA spotting in Shanghai.
Lastly, I am using Zeiss these days since I was able to locate a "cheap" source of Zeiss products here in Shanghai two years ago.
Jimmy Ng
member of HKBWS and SHWBS ( shanghai wild bird society)