'Tis true, the front end will feel a little stiffer, some like the feel, some hate it, most don't care. However, don't think by paying for the leveling keys you'll eliminate that feel. Although maybe not quite as severe, you are still putting more torque on the torsion bars whichever way you go.
So I'd say crank 'em, just enough to take that "raked" look out of it, but don't over do it. Short of paying big $$$ for a suspension lift, this is your best bet...