In my case, I went to position #4 which was 1.65". This placed me around 37" all around to the fender flare. On a stock setup, I believe you'd want to go with position #3 which will net you around 1.1" of lift in the front. Simple tape measure reading from the hub to fender flare all around will let you know.
For off roading, you don't really want to go higher than 1.5" (ideal) - 2" (max) as it's all a compromise with wheel articulation on an IFS (not accounting for CV angles, etc.). Zero issue with alignments at this lift range.
Go with the 6112's if the 5100's aren't what you're looking for. No wrong choice here, both are an improvement over OEM. We run a 265/70R18 e-load tire for remote touring / overlanding, so your tire choice will have the largest impact on comfort and ride.