From someone who has trail tough missing links (the only well made drop shackles), lockers will get your further every time.
To expand on that, lockers and stock flex will get you more places than lots of flex and a killer suspension without lockers.
It does not matter how many wheels are on the ground if you have no traction. I pcik three wheels and tractino over four wheels planted and spinning any day.
How many times have we heard or seen the near stock Sierra out wheeling a (insert bad ass flex-mobile on 33"-35" tires here) with only 28" tires, a locked rear, and some guts behind the wheel.
