Bennefits of Router Raiser
Recently installed a Router Raizer in my 3-1/4 hp Triton, which unlike yours, has an auto-lock collet when fully extended, so that's an additional benefit I have that you don't. But to me, the PRIMARY benefit of the Raizer is realized when adjusting bit heights.
Speed changes are comparatively infrequent. In your case, bending beneath the table and reaching for the bit lock is typically performed with a single action (twist/turn, push/pull, etc) and is limited to initating and finalizing bit set-ups. That limited activity is quite different from the back-bending, reaching, turning/pulling, eye-toggling back & forth to get it "just right" actions so often required when adjusting bit heights, and finding you have to do it all over again following a test cut! Or you may be like me, and simply settle for less than what you'd really want and say to yourself, "That's good enough!" just because you got tired of all that finagling!
This is when you'll be thankful you spent the extra 90 bucks, time and time again... and so will your back!