I've read tons of positive feed back on the OME kits. IMHO, I'd drive it before you add the transfer case drop. I think you should be fine with 2". If nothing else, add a couple of fender washers in between the skid and the frame to drop it down as little as possible. That's what I did, and it also creates a little space between them to keep clean and prevent the rust that always builds between the two.
By the way, I've got the Zone 4.25" combo lift, and did not need front brake lines, even when disco'd. People rave about the Metal Cloak track bar, saying it's the best bang for the buck at $199. I got a Steinjager that I am very happy with at the Dayton Off Road Expo for $150.