I fall into the "no-finger grooves" camp.
I also feel that having the trigger guard high cut adds greatly to the feel of the gun.
My carry gun is a GenII G17 that has no grip work at all done to it, for now.
The gun I compete with is a G34 with a LWD G24 slide and barrel for use in Limited class.
Grip work was done by Dale Hunnicutt @ gripreductions.com.
Slide work was done by a gunsmith that is local, and quite famous, however I will not post his name.