For fishing that thick grass and timber, you cant beat braid. Like you said, no stretch, thinner diameter, abrasion resistance is amazing, it is also very sensitive, IMO you dont get as many backlashes, and on a reel with a mono-backing it is fine. After I put the braid on, I tie on a hook, set the hook into an immovable object, walk away until all the braid is out, then put a lot of tension on it and reel it in. So I have no issues with it on the spool, but dont do it so tight that it cuts down into the line already on the spool or casting will be tough.
The only issue is with knot tying, if you are flipping with a hook that doesnt have a completely closed eye, on the hookset the knot can slip down to where the eye has an opening and the hook and line will seperate. Only happened to me once though.