Are you looking to pair the 5100's with 885's or OME 3" lift with 885's?
I have 5100's all around and 285's. Plan on getting a AAL later on. I have 885's at home just not on. On the fence about putting them on. You could do what ilovetacos
did. Serve his needs and purpose. Not sure if he has plans in the future for upgrading.
5100's alone are a great way to lift/level off the truck at a good price. Depending on your purpose (daily driver?) of the truck you should be fine. If your looking for something beefier (off roading) but on a budget then look into the Ultimate Lift Kit from Toytec
or the OME 3" Lift. If you have some dough to spend you should look into FOX or Icons.
You should be good with just the AAL in the rear. The TSB (even though i would like to have it) is too much of a hassel to deal with from what i've read on the forum.
4.5 backspace, hub centric wheels, new UCA's (highly recommended but not needed), and definitely get it aligned after the install.