It is a good idea to change the spring isolators. You'll need a new lower pinion snubber (comes with many types of springs). And you will need offset steering rack bushings to realign the height of the steering rack to the new ride height. All of these items are cheap.
Hmmm, maybe a full kit would be better in my case, since I'll be doing it all at once. Where's the best place to get either the Eibach Pro kit or the Hotchkis TVS. I think the TVS has more included, but the Pro is a bit cheaper.