Baofeng,
I was a stargazer long before I became a bird watcher. My first great binocular was the Fujinon 7x50, the 10x70's "little brother". When I started birding, I was happy to use my Fujinon, as you are now, because of its superb optics. But, upon discovering this forum, (I didn't know any birders personally at the time) I learned that the small 42mm or even 32mm binocular was the typical instrument, usually made with roof prisms. I slowly came to realize that my relatively large, heavy, and slow focusing Fujinon, despite it's satisfying view, was probably not the best for carrying around on a miles-long birding adventure, where one is likely to be surprised by close and fast-moving birds. In that sense your 10x70 is even more inappropriate than my 7x50.
I am now a convert to the typical birding binocular, and highly recommend something like an 8x42 or 10x42. I must warn you however that it is very expensive to buy a roof prism birding binocular that is optically as good as your Fujinon. It is fortunate that you are prepared to buy a Swarovski spotting scope, because it will cost almost that much. I cannot recommend less, or you will be disappointed in the view. I can tell you that you are spoiled rotten and may not realize it. But you would be beside yourself with joy, and would see more birds, with a lightweight binocular which is quick and easy to use. I also watch owls with my 8x42. Ease of use can be as important to what is seen as raw optical power and light gathering ability.
Ron