Check this out:
8x50mm Correct-Image Right Angle Finder
listed at $99
http://www.aoe.com.au/finders.html
Now what to do with the remaining $401. Binos? Eypiece(s)? More finder thingies rad rigel nigel? Dew heaters?
I think the ED80 will be too heavy and field of view too narrow for a finder even with some of the longer FL wide angle 2" eyepieces.