I have had a 2002 RR HSE since the end of 2004. It has been a very good truck. It performed beautifuly on Lion's Back in Moab, UT in the summer of '06 and recently ran the Broken Arrow Trail in Sedona, AZ. It did The Steps there with no problems. (an obstacle most oftenly seen tackled by a modified jeep)
The 4.6 is a very powerful engine. In compound low it can climb up most anything without complaining.
If you buy one, see if you can get the extended warranty. The EAS system can be expensive and seems to ware out at around 60K miles. Also see if the dealer can enable Lazy Locking so that you can use the key to romotly roll up your windows and close your moonroof with the push of a button. It really impresses the friends.
This is a very good vehicle off road that I guess the general public hasn't yet figured out.