3-links are affordable, that's really the bottom line. The flex good its true, but a radius arm (4-link) kit with johnny joints can flex amazingly well. Whether its a long arm or short arm kit with dropbrackets, as long as you have the right components on it, you're flex wont be compromised. A good set up on the track bar will greatly improve flex as well. You also want to make sure that you're shock set-up is properly dialed in for the amount of droop & stuff. You don't want your shocks to limit your travel.