I have a Swarovski AT-80 High Definition . It's simply an outstanding piece of glass. Like already stated when you get to the top end models, they are all going to be good, it gets down to personal preference and price. I would suggest that you try the straight and angled eye pieces and see what one you like better. I chose the 45 degree model due tro it;s being a bit more flexible. I also would suggest you give the 360 degree quick releaseball mount for the tripod.
Here is a pic of mine.....
