Aftermarket keys won't be better for ride quality at all, not one bit. Stock keys and aftermarket keys both turn the torsion bar to change the geometry of the lower control arm. There is no other way around that fact. So either way you do it, the ride will be the same at a given height. And aftermarket keys have more adjustment in them because they have been re-indexed, but your stock keys can crank until your upper control arms are resting on the bump stops, and you can't go further than that. You will have adjustment left on the bolt for your new aftermarket keys, but you won't be lifting your truck any further no matter how much you tighten them.
Moderate cranking is ok, but cranking too far can destroy front end parts as ball joints and tie rod ends are taken out of their range of designed angles in the suspension. As you crank the keys the lower control arms start to move downward, changing the angles of the ball joints (lower and upper), and bringing the knuckle down with them, which pulls the upper control arm down. As those knuckles go down, so do the tie rod ends, driving everything out of its designed operating range.
Hope this helps.
