I once thought that beefier was better as far as the flares were concerned, then I got to see some in action. A friends Rover has 1/4" flares, and while they look nice, they're not functional. Hit a tree or lay over on your side and they just bend the body, not the flare, and the body is much harder to repair. So then you have to reinforce the whole area, and then you're talking about one heavy vehicle. Anything that sticks out will get dented on a trail, no doubt about it.
What I did was to use Lawn Edging, and attach it with snaps. That way I can remove them when wheeling, yet still stay legal on the road with the wider tires.
If they get twisted or destroyed, they only cost $5 for all 4, and they are so flexibe it'd be almost impossible to destroy them.
Winter Harbor, Maine
'81 CJ-8 Scrambled, It's a Jeep, Chevy, IHC kinda thing!
'88.5 Zuki, 7" Lift, Locked, Swamped, Rolled, and just generally broken in right!