While i recommended the polish to begin with, I have to admit the gold dot's (aka "McGivern" front sight) are fun and classic. Another thing that is great is fiber optic posts - I installed one of those on a 1911 I had and wow. In 20 or 30 years when I may be blind, I think I could still put in some V-notch rear blades and a fiber optic front post and still go shoot pretty well! Fast and accurate! If circumstances call for it, go for the solution that works.
But even with a "new" classic 27, I'd try to keep it stock and see if the polish will do it for you. On the older 27's, even the Baughman front sights (milled in standard on most all other S&Ws) were staked in on these models (and 29s) to allow for maximum flexibility to the owner. A nice touch. But still, they were installed before finishing. The front sight insert and pin were so well polished into the barrel, it sometimes takes a flashlight at the right angle to reveal the pin in the bluing and reveal they are not integral to the barrel. The new 27s are about as nice. To un-pin that kind of work is shame! Try the polish, hopefully that will work before true surgery is required.