3" is about the max with the 5th Gen front suspension without going to more serious changes. Any more and you're putting too much stress on the CV joints at droop. Yes, you can add an adjustable coilover (Billy 5100's being the cheapest option) or taller springs with your spacer to gain more lift up front, but I wouldn't plan on going offroad with that setup. You'll definitely need a new upper control arm to get the alignment in spec. I know there's a diff drop kit that's supposed to help with the CV angle, but I've heard that it doesn't really accomplish anything. You'll have to ask the experts about that one.
Another real issue is that most springs were originally developed for the 4th gen and we simply use the same ones. But we get about 1/2"-1" more lift out of the same springs depending on things like rear seats and such. So a 2" spring will give a 5th gen 2.5"+ of lift. You lifted 3" in the front, then 2.5" in the rear.
And finally, you should be looking at the frame, not the wheel wells. They aren't parallel. If you level it such that the tops of the wheel wells are the same distance from the ground you'll have a reverse rake on the frame and rocker trim.