I have a Kowa Prominar 884. This year alone I used it to field judge bull elk over 5 miles away (as a crow flies, measured on Google Earth) and used it to help my Dad get one of those bulls that scored 341 5/8"! Two weeks later I was out helping my Father In Law get his elk. I spotted a nice bull laying under a cedar tree at 3.75 miles (again as a crow flies, measured on Google Earth). After watching him for about 20 minutes my FIL decided he wanted him. We put the plan together and he ended up getting him a really nice 5x6 bull that is very unique. You could not even see the bull with binoc's even when we knew where he was. We would have never seen nor got either of these bulls without the use of my spotter.
From what I see, I would recommend getting you the best, the 883 or 884 (depends on what style you prefer). It is worth the extra money to get the Florite, it allows you to resolve things that lessor lenses just dont have the ability to. At first you may not be able to see the difference, but when you start looking farther away and want to see those fine details and you can't, you will be sorry that you didn't spend the money if you go with a lessor scope. Generally with the Prominar you will think your focused but then you really fine tune it with the slow dial and you find out that you were not focused, it is that good!
With the Bino's you already have, I wouldnt worry about wide angle as the spotter isn't going to give you more than the Bino's. When you want to see details at long distance, that's when you break out the spotter. As for what you want, the Kowa's will easily do everything you listed. It is the best money I have ever spent for hunting besides my gun. Ohh, and yes, the larger size is worth it!