Lift or bigger tires?

OP, what's the budget? You really should get your lift from your springs. For about $700 you can get some Dobinson's ext travel shocks and struts and 2"-3" springs with blocks for the back. They make there own springs, I'd go 700lb spring rate OR higher.

If It's a total budget build, that's cool too, I have some spacers and blocks maybe even AAL in the shop laying around you can have.

If You go the 5100 route, I suggest not using them for lift, spend the extra couple hundred bux and buy longer springs. But the travel is not that great on 5100, for the same money Dobinson's offer about an extra inch of travel.