Ignore Pokey. He hates everything/everybody unless they agree with him, which is so rare that you can time it by lunar eclipses.
K&Ns are excellent, properly treated. 25K is good and the dealer will sell a "recharging kit" which includes cleaner and filter oil. These are used off-road in ultra-dusty situations and while the alleged performance boost is negligible, I prefer a filter that doesn't have to be thrown away regularly.