I just bought the Monroe Sensatracks. Sears has a special on them right now I believe 7/27 through 8/6 2002 at least here in Southern Ca. The deal is buy the shocks and get free installation, with a lifetime parts and labor warranty!
I originally was interested in the Monroe Reflex but the sales people I've spoke to both at Sears and Napa Auto parts said that the Sensatract was a very good choice for an Explorer, and the Reflex was only a marginally better shock. The total cost with installation was $152.49 including tax and unfortunately the Monroe Reflex's are not included in this sale. Like you my OEM shocks where shot!! I also had an alignment done and the X just feels tighter in turns, and the ride is sweet.
I know some people have said that the ride is a little harsh with these shocks, but I totally disagree. The on highway ride is honestly better than I expected for LT shock.
I have also taken them off-road since we got them installed, and I am pretty impressed with the off-road experience too. By the way the trail is rated as moderate-hard in difficulty, and loaded with deep potholes, deeply rutted road with areas thick with rock, that I have done before, and there is a definite improvement in the off road ride.
I know the BFG AT/KO's help allot, but I have done the trail before with the same tires and there was a noticeable improvement in the ride this time.
I've heard allot about the Reflex shocks, and they're at Napa for $45.99 and the local auto repair shop only wanted $55.00 for installing all four, but that comes to roughly $255, a hundred more than the Sensatracks so..
I hope this helps and though and good luck.