Before you do anything, Id give the factory grips a try. You never know, they might turn out to be just what you want.
I dont have a 69 (still looking for a snubby), but I do have a 3" 696 (44 special L frame). The Bantams are what I have on it.
The Mono grip actually makes it a nicer shooter, if youre planning on shooting it a lot, but also makes it a tad bigger.
I shoot revolvers DAO, and that little bit of offset you get with the grips covering the backstrap, makes a noticeable difference in how the gun feels in the hand, and how the trigger feels leverage wise.
It may also be all in my head, and Im sure if I worked at it, I wouldnt notice in short order, as I got used to it, but all my other S&W's have the same exposed backstrap, and they all feel the same in my hand, .22's - 44mags.
The focusing of recoil into that raised edge on the other hand, is something else, and I dont see how that will go away without a change in how the grips are shaped across the back.