Like any question asking for guidance for any product,
reasonable cost needs to be defined simply because it's a variable , some can afford more than others. So what is your idea of reasonable?
We all seem to see differently when viewing through spotting scopes or riflescopes so first hand experience at your local dealer or Sports Show will help tremendously.
There are a few folks here on the ELR forum who believe that only they have the information which should be regarded as gospel because of their experiences. So there might be some hesitation on the part of the rest of the ELR shooters to offer an opinion. But then again, opinions run the gamut when asked on a public forum anyway so here is what I use:
Kowa Highlander 82mm binocular spotting scope
https://www.rifletalks.com/equipment-reviews/kowa-prominar-high-lander-82mm-japanese-big-eyes/
Or in a single body form:
Kowa TSN-880 Series Straight Body High Performance Spotting Scope with PROMINAR Pure Fluorite Lens
https://www.optics4birding.com/kowa-tsn-880-spotting-scopes.html
The single version (TSN-880) runs about 1/2 the price of the binocular version.
I started out with 'Big Eyes' spotting scopes so I had to save for awhile before buying these.
Enjoy!