My preference would be towards a 65 mm spotter with a good, wide angle 20x eyepiece. Specifically I would suggest the Pentax 65 mm EDII with the Pentax XW 20 mm eyepiece. That isn't a cheap combination but the optical performance is excellent. The image is extremely wide at 176 feet plus it is sharp with excellent edge sharpness. You can use the entire 176 foot field of view. The scope body weighs around 37 ounces but I am not sure on the eyepiece weight.
I would honestly put that combination against any set of "big eyes" currently on the market.
The beauty of this choice is that you could then use a zoom or any other 1.25 inch eyepiece on the scope if you feel you need more magnification.
