I have 2 of the 2500 size. They turned out to be some of my favorite reels. Very smooth. Great drag. I bought a Gomexus power handle for them too & that was a great idea. I like my Spinfishers just as much as I like my Shimano Stradics and Vanfords. I have not dunked them, so can’t report on that, but they do take spray & abuse.
I might recommend you go with the Slammer line tho, specifically the DX variant to get the bronze main gear. Spinfisher & other non-DX variants have pot metal which may deteriorate a good bit faster for your particular application. But now we’re talking about a $400 reel..not a “just over $200” reel, so there could even be other options in that range if that price-point doesn’t scare you off.

What species are you targeting? Do you have a preference for braid or monofilament? Will you be pitching lures or using natural bait?