Unfortunatly keeping stock springs you're limited to spring spacers which are not a good idea on stock springs or a body lift.
this is just purely my opinion not fact or anything else. But I would sell the stock springs get a new set of +2" springs. I would suggest RoverTym but OME are good also. You can keep your current shocks although they will limit your down travel some.
2" of lift is about as much as you typically want to go before you need to start correcting your castor and getting a DC front drive shaft. Again this is subjective and depends on how much ride quality you want to give up. You don't "Need" to correct anything but if you want a closer to stock road performance it would help.
Tires are going to be the big bucks unfortunatly. With a 2" lift and minior triming of the hind quarter panel you and fit 235/85-16's on easy they are about 31.5" tall and 9.5" wide.
I put retreads on mine because I could get 5 of them to my door for $415 and I do minimal road driving with it. < 50 miles a week not including travel to go wheeling. They are a bit noisy on road but they continue to impress the hell out of me off road.
Cheers and good luck