I've got dual cases, 2.28 in the front and 4.7 in the rear case. I do good mix of everything. Driving, Dirt roading, crawling and snow wheeling. In the snow I've used either the 2.28 or 4.7 pretty regularly but not both. Honestly for an "All around rig" i'd go with duals first. Then you have the option of of low or low low.
