Kast brand steelhead gloves get great reviews but they’re $100. I bought one of their cheaper models (now discontinued) and they were great. Simms makes fishing gloves but I haven’t tried them.
I hate fishing with gloves like most guys – when it gets really cold I prefer the wool glove-mit or glommit or whatever they call the fingerless gloves that have a flip over mitten for your fingers. That said, I did a muskie fishing weekend in full on rain and sleet with temps in the low-mid 30’s. We were casting. Without the Kast gloves I couldn’t have done it. They started to leak after about a year but that might have been because of hooks or teeth! They worked well with a big bait caster but I’m not sure how I’d like fishing with a full glove and a spinning rod.