I have a Burris 4-12x32 R/A on a Weihrauch 97K (7.5 joules).
I choose this setup as this Burris have the shortest AO (7yards) for indoor training.
I like it, not cheap but compact with good turrets, bright and clearly focused image.
I use mostly fixed on my (real) rifles but i may have use for another varible of this kind.