I installed those on my jeep they are easy to install and you really don't need new shocks or anything I never put 2" bump-stop extensions on mine either. You will bottom out your shocks if you disconnect your sway bar. So longer shocks are a good upgrade in the future. I wasn't satisfied with amount of lift I got from them but I'm pretty sure my springs have sagged from age I have a 99' with 80,000 miles. I picked up some v8 zj springs the other day from a salvage yard I plan on replacing the spacers up front with the zj springs but I'm going to wait and get longer shocks first. The spacers are a good start it gave mine a little better stance than stock and I didn't notice any change in the ride quality.
Here's pics of mine completely stock and then with the 2" budget boost.