Simple direct bolt in swap sets of shocks, are going to keep you in the lower end of the shock spectrum.
To get to the next level of shocks, you have to do some homework for sizes, and how to install them. When you move past the "Made for stock application" shocks, you shop for sizes, & types. Eventually, the higher end you go, the mounts are universal eyelets, and your only after sizes.
Certain modifications will be needed to install these higher end shocks. Your also going to need deep pockets, and a shoulder to cry on, when you realize your shocks cost more than what you paid for your Explorer.
I suggest searching the modified sections of the 1st & 2nd gen forums for rear shock upgrades, and 2nd gen forum for front. The user registries showcase members rigs in all their glory as well. Most have a link in their signature (as I do) that will take you to what they like to share. There is plenty of threads / posts already there sharing the knowledge, and the How too's of getting these higher end upgrades installed.
Here is my 2nd gen with the Fox shocks. Lots of work to get these installed, but well worth the pay off.
Front
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Rear
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