Articulation w/ Lift

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Hi,All! A few questions I kind of need help with .

Well I'm finally getting around to modding my 05 "Adventure series" (w/air ride) SUT for better off-road action.

I have been looking at various lift kits ie.. the normal ones Fabtech / Rancho .etc.

After reading the descriptions of both of these lifts I realized they use the stock rear air bags with a spacer. Wont this leave the articulation exactly the same as stock? Seams kind of lame to spend close to 3k for a lift just to add slightly larger tires with no articulation increase.

If this is the case. Has anyone figured out a better way to do the lift for added articulation, like maybe after market longer air bags or even better, coil over air bags that fit and lift? Or a better lift than the two mentioned that has added articulation factored in.

I know the lift kits say to use 5" back space rims. I'm wondering if I will be able to use my stock rims as temps till I find the rim / tire combo I like?

Looking for rims I keep running into the question "what is the wheel stud pattern or measurement". Anyone have this info or know how to get it?

Thanks in advance for any and all responses.