If you like big booms and recoil for fun then a 12ga is probably best in terms of boom per $$$. Maverick 88 is perfectly serviceable and will eat hard-recoiling loads all day long. People like to talk about the larger slug loads but honestly something like picrel will rock your shoulder harder.

There are some other pretty good contenders though. Modern commercial dangerous game rifles have little collector value, and like big magnum handguns a lot of people buy them, shoot half a box of ammo, NOPE out because of the recoil, and you can buy the gun used at a discount often with that half box of ammo thrown in. It's not hard to find a deal on a Rem 700 in .458 Win Mag. If you're a bit more patient you might score a deal on a .460 Weatherby.

Lightweight magnum hunting rifles have infamously high recoil but they don't really have the big boom so nobody shoots those for fun.