If you want to have a really comfortable ride and still have great stability with a heavy load, you don't need to look any further Get the Bilsteins, You won't be sorry.
If you want neat looking stickers to paste all over your back windows, you can get Ranchos or some of those other shocks
I've had Ranchos on other trucks before, they're probably partially responsible for my bad back.. I had some other heavy duty shocks on my truck that I gave away when I put the Bilsteins on, The bilsteins are smaller, but hold tighter with a load on, and I can take the curves faster with the 5er on but when empty, the ride is much nicer.