My experience with Monroe shocks was terrible… I bought a pair for my Chevy Silverado because the OEM fronts were obviously blown and being lazy I basically tried to do it as fast and as cheap as possible.
They worked ok, stopped the bounce, but over the course of a couple years they progressively got worse, almost back to where I was in the first place. It didn’t feel blown really, but started to drive more like a boat. Dives on breaking, floating like feel at freeway speeds.
Changed out to Bilstein 5100 and it was night and day. Still on OEM springs. I know it’s a different truck, but the shocks were all I needed. Differences from factory blown, to fading Monroe, to 5100 was night and day.
5100 and 4600 are supposed to the same shock for the most part. One being for lifted truck, the other for stock. I still feel there are some valving differences because some people report the 5100 having a slightly stiffer ride. YMMV, but id suspect both would be a substantial upgrade from some bottom barrel shocks.