Yeah I know RL warranties there stuff, but I was thinking more along the lines of factory related breakdowns. Like U-joints, Ball Joints, CV axle etc. and even worse if the something goes wrong with the drive shaft or motor I don't want problems. I don't anticipate anything happening, but the moment you think that bam!! it happens. It's more piece of mind for me then anything. You're good you have 3rd party warranty, but I would still be a little weary of them saying anything against non-oem modifications. At the end of the day whatever works for each individual is the most important aspect. Both kits are great, so like you told me before you can't go wrong with either and I agree on that. Once my warranty is up (be it because I am at my mileage or date) I may think about upgrading to a 4" BDS lift but I don't know I only hit pavement so I don't think there is a really advantage for me.
I will take your advice, and stick with the 11.5. I think it will be better on fuel and snow as it's not so wide. I know you don't need to worry about snow haha.