the 4.7 gears are nice but are more tech involved than the dual cases. but w/dual cases you have to do drive shaft work. Loose cannon has a very good rig and can drive daily without a prob.
5.29 gearing w/a 4.7 case will give you about the same crawl raito as dual cases w/ stock gears ( 95 to 1 w/ a 4.7 case / 108 to 1 w/ dual cases) the diff is pretty small. for the money I would go w/ 4.7 kit its not to hard to install and no driveshaft mods to do.With the 5.29 4.7 t-case you can do great on the trail but still drive on the road at 70 at about 2800 rpm.