DDWH suggested this site -
http://www.trailduty.com/products/wranglernw/index.html
also, I started an alternator thread a few days ago which has a few good replies - ck it out.
I'm running 55W fogs in the front, 4 130W KC up top, 4 55W KC work lights on the side of my roof rack, removable Ramsey winch and a 15" monitor for a DVD player. I obviously never have everything on at the same time, but my worst usage would be the TV and top lights on at the same time. Rare that I would do this, but why not have a HO alternator?