To touch on what LoganSix said. The 2003's are nice if u want a rig that has good manners onroad and goes like mad offroad. However, I do want to throw one twist in there. If you plan on going crazy with it. Get a 2002 or early 2003. They have the stronger tranny.
Also, I do not want to jack the thread, but if u are interested, i've considered selling mine. Let me know if u wanna talk about it some time. I'm considering building a "off road only" rig.
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2003 Liberty Sport 4X4
DIY Frankie Lift, BBS Rims, Aussie Locker Rear, DTT Front, Renegade Rack & Light Bar, Custom Front Bumper w/ Warn XD9000i, Custom Rear Bumper, JBA UCA's, Full Skids(Mopar, Kilby and Super skid), CRS Rock Rails, CB, EVIC, Nav, power dim mirror, (2) 8" subs under front seats.
http://www.cardomain.com/ride/2512777