3.73's are the right gear for the math. I'm running 3.73's (was 3.07's) and 31's and I pull about 2600-2800 RPM at 70 MPH. I'm getting about 20 MPG out of my jeep..

33's with 3.73's would drop the RPM's to near stock levels....

That said, 3.73's and 31's with low-range is a very nice low gear for the trails.

If I were you I would go with the 4.11's and 33's. It will be like no OD, you won't be taxing the motor at 70, but it won't be the most fuel efficient possible. You will have nice low gears for off-roading and towing which is very nice.