I ran 2.5" lift and added .5" top spacer with no dif drop. I did not like it. Front end feels too maxed out. Not much down travel. I went back to 2.5" and the vehicle rides much better. Also, 3" and stock UCA's were not a good mix. If you insist on 3" get UCA's also.
Plans for the rear? Going to be nose high with 3" up front.
Also, I found the shocks on Jet.com for the cheapest price. Just double check the part #'s if you go that route.