2011 XLT 4x4 needs shocks any recommendations.

 

Bilstein 4600's.

 

Shocks are a personal choice.

Tires are the first "shock absorbers", lower pressure will absorb smaller bumps, higher pressure will pass bumps on to springs.
Tire maker will have "their" recommended pressure, but "they" are not riding in your truck, so pressure is your choice.

Spring ratings are set for vehicle weight, rear leaf springs on pickup trucks are tough to set since weight in the bed can vary greatly.
If springs are too "soft" vehicle weight will deflect them too much when you hit a bump or dip too much when you go around a corner
If springs are to "stiff" then vehicle weight can't deflect the springs enough so basically like having no suspension at all, you feel every bump passed on from the tires.
(this can happen if you "crank" torsion bars to get higher ride height, you are increasing spring ratio, so usually get a stiffer ride)

For rear leafs in pickups I like softer springs with overload spring added, an overload spring is a leaf that doesn't touch the frame until load/weight in the bed gets up to a certain point.
This gives a better ride and better traction by keeping the rear tires on the ground.

Now the shocks
Shocks are there to keep the springs from continuing to bounce after a bump.
They are filled with oil and have smaller holes that the oil must pass thru when shock is compressed or expanded, the size of holes and chambers for the oil decides its compression and recovery from deflections.
A shock can slow a springs deflection making for a stiffer ride.
A shock can be too weak for deflections and not recover quick enough, making wash board roads a rougher ride than it should be.

Best shock?
Personal choice, and really comes down to what the truck will be used for, highway mostly with some off-roading means softer ride, for better traction
High speed off-road racing would be stiffer springs for multiple deflection recovery

If your suspension is too stiff the tires will come off the ground on bumps, and while that may look cool in a picture, it is a very bad for controlling a vehicle, lol
Best suspension keeps all 4 of your tires on the road as much as possible

 

I found my carpet was wet on the driver side on flat part of floor. I lifted carpet up and could not see water coming from anywhere, I did notice that the rubber floor plug had duct tape over it. Suspect that me be the cause. I can't see it from under the truck because the catalytic converter is in the way. Anybody else experience this, if so what is the fix.