New shocks?

Bilsteins are a good middle of the road not too soft not super hard, lasts forever shock.

I am running Bilstein 4600 shocks on my 2018 F350 diesel 4x4 CC dually with an AF 990 TC and am happy with the ride.

I've been running Bilstein 4600's for the past 5 years, great ride and a durable shock.

Bilstein 4600’s

If you want a bit softer ride go with Bilsteins. I had 5100's on my previous truck and have Fox 2.0's on my present truck all carrieng the same 990 camper.
The Fox's are difinetly stiffer. Better off-road and with a load but they are more firm than the Bilsteins if you want softer.
Hear good things about Rancho to, adjustable from what I can tell.
Good luck.

If your suspension is cycling more than once after going over a bump, you need shocks. Otherwise, you need more spring.

Why do you assume you need new shocks? With any luck they will last for several more years.

Are you having ride issues?

Installing new shocks is important IMO. The make of the shocks (if a quality manufacturer) isn’t important.

I like my Bilstein 4600 shocks. You will get a lot of other recommendations.