6.5 is better but if u drive it alot on the road then 4.5

Yeah it's not gonna be a trail rig, it's gonna be my dd with occasional offroading. Maybe a couple of road trips a year, but nothing over 200 miles. Mainly driving to school and into town.

then 4.5" is better,cause you still want atleast a few mpg lol

Just my opinion but the best set up is the new RC 6.5 long arms withe fender trimming and 35x12.5x15 on 15x10's 4.10 gears for some snort and good mileage. I could ague this point for days but won't it is in my opinion the best most visitable set up you can have oh and the new BFG KM2's This gives you nice on the road and great performance on rocks trails and mud.

4.56

If you chose I run a little off gear from every one else it seams. I find 4-low way to low most of the time. but I also don't get to crawl that much.

If i were to get gears, which ones give you the best mpg?

Also bfg all terrains or bfg mud terrains?

Depends on the tire size and all terains would be better for mileage

In my opinion those all trains are no trains seen way to many people in rigs that were set up nice get stuck in 1 inch of mud and a slight incline. Good street tires and snow tires but worthless off the pavement.

i got a 4.5 in rough country lift with AAl in rear wish i woulda went with full leaf packs. but i dont have a SYE or transfercase drop and i dont get and bad vibrations on or off road

Control arm drop is not the main thing to defeat vibration. Either a SYE or a transfer case drop kit is what your looking for.