1998-2002 are the best ride coil springs not leaf springs still old school looking and have the 727 style automatic transmission only a 3 speed but best automatic for a jeep, 4.0 tried and true motor, the 2003-2006 4 speed transmission if you take extra care of it maybe 100k miles, and the 2005-2006 are known to have wiring issues. Don't know much about the newer models other than stay away from the Fiat owned Jeeps
Dieselt
will vouch for that.