Jeepjeepster... I think that I'm going to go with the same lift as you. The 1.5" front/2" rear lift from Daystar with new shocks in the rear. Reason being is the 2.5" kit is $75 more, and the only difference is an extra 1" up front. Otherwise they are identical kits. So since I HATE the "higher in the front than the rear" look on many lifted rigs...I'm going to go with the Daystar kit you mentioned and use the extra $75 to buy some rear shocks.
I was thinking about the "science of lifting a KJ" the other day. You know, if you think about it...since the KJ has a solid rear axle, NO lift kit is going to get you more clearance under the rear diff. The only extra clearance back there will come from taller tires (which you can only do because of the lift kit). But the kit itself doesn't lift the rear axle any.
In the front, since there is IFS, the lift kit WILL physically pick up the front end of the Jeep. So basically, what you are going to have is about 1.5" more clearance under the front end. And about 0.75" more clearance under the skid plate for the transmission.
A lot of guys on here measured after installing their 2.5" lifts and wondered why they didn't pick up 2.5" of ground clearance all around. That's because of how the lift works. So really the best "looking" lift for keeping the Jeep more level would be the 1.5" front/2" rear lift. And it would also be just as functional overall once you get new tires. And it's $75 less.
I'm glad I looked around before I bought because
www.boulderbars.com doesn't have the other Daystar kits shown on their webpage.
OH, and also, the rear springs won't be compressed. They will just be sitting on solid spacers for added height. There is no extra compression there at all. So the rear should ride just like factory. The front end is a different story. It will feel tighter because the spring is being spaced with the spacer, but the attach points for the A-arms are stationary. So that "stretches", or compresses the spring rate more and will make it ride stiffer up front. Another reason I'm going to stick with 1.5" up front...