Make sure you have an hour or two free when you do...
I would go for 4" lift straight away I did a 2" & now regret it. Llama does the 4" Rough Country lift.
Actually, you have a 2.7 so already have the +1" "up country" springs. Bear in mind all US spec lifts quote the lift for a petrol model, so take off 1" of the lift they give. TBH with a 2.7 I would deffo go for the OME springs, maybe the HD ones as they give around .75" more lift over the standard ones
For swingers try the Blue Oyster...IOM knows all about it..