You should seriously consider wheel guards if you do loads of off-roading. A bit pricey (around $500 for a set) but well worth it in the savings on the wheels themselves.
(These are basically steel discs that mount to the CTIS holes and provide protection to the whole wheel - check my homepage for pics of bagman's)
2001 H1 Opentop
Former 03 H2 Adventure Series
Homepage:
http://www.hummerh1.net