Best scope choice for HW97K.25
Seems like a .25 would be hunting, pesting and plinking vs FT or bench. If that's the case, then nothing special needed I think. Maybe a UTG (cheaper) or a nice Hawke Airmax (more $$). I don't think you'd need to go high end, but you could always do so anyway (Spurge!).
I have a Athlon Talos on my plinking gun and it was fairly cheap, and a more expensive but low end Vortex on my "nicer" FT and bench/paper puncher (LGU). The Vortex is a Strike eagle, chinese made vortex scope and I like it a lot, I think it's 4-24x. Nice glass, great reticle and good turrets. The warranty is awesome (with Athlon as well). The scope is just a touch heavy for my tastes. I think SWFA has a good sale right now and a fixed 10x SWFA SS could be sweet. Check them out at SWFA.com. They have used scopes at samplelist.com I think and were offering 15% off (not sure if it's still in effect).
I have a .177 cal 97K and I use a SWFA FIXED 12x on it. It does not have an illuminated reticle. I think an illuminated reticle would be a good option for hunting situations in dim/dark lighting or dark backgrounds. Just something for you to consider. The UTG scopes are a good value and are tough scopes. I would think mil-dots or some other multi aim point reticle would also be desired for hunting at various ranges especially with a .25 springer. I imagine there will be quite a drop in POI over a relatively short distance with the 97 power plant.
whatever you get, enjoy!
Ice cold milk and chocolate chip cookies any day!