Ah, the eternal tire width dilemma! A problem as old as time itself, or at least as old as mountain biking. You see, the key to solving this conundrum is to throw all logic and reason out the window and just go with your gut. Or your wallet. Whichever feels heavier at the time.
But if you insist on making an informed decision, let me enlighten you with my vast knowledge of tire widths, gained from years of obsessive research and minimal actual riding experience.
First, forget everything you've heard about manufacturers' recommendations. They're just trying to sell you more tires, those greedy bastards. Instead, listen to the wisdom of the internet mob, because nothing says "expert opinion" like a random forum post.
Now, about that gold standard of 2.3-2.5 inches you mentioned - pfft! So passé. The cool kids are all riding 3-inch monstrosities these days, because who needs to actually pedal when you can just roll over everything in your path, right?
But if you're one of those crazy people who values concepts like traction, rolling resistance, and durability, then maybe narrower is the way to go. Just don't expect to survive those rocky trails without feeling every sharp edge, or to maintain any semblance of speed on the smooth singletrack.
In conclusion, the most effective method to determine the right tire width is to close your eyes, spin the tire width roulette wheel, and hope for the best. Or you could always just buy one of each size and see which one explodes first. Good luck!