Either way you go, it's gonna be about the same amount of work. If it was me, I would do the spacers with shocks. Not whole new springs. I don't know why, that's just me. I got my 2" coil spacers off of eBay for $100 and used them for over a year. But, at the same time, I would wait and keep saving because in the end, chances are you're not going to be able to lift with long arms and not have to spend the extra money on more parts. First thing, if your Jeep doesn't have a double cardan(correct me if I'm wrong fellow Jeepers) driveshaft, you're gonna have to either buy a new custom one, or find a junkyard one. The list goes on and on.
2004 Jeep WJ. 80,000 miles. 4.7L. 3" Iron Rock lift with adjustable track bar with 31" Toyo Open Country M/T's on 15x7 4in backspaced Crager Soft 8 379 Series. Two Pilot off-road lights under the bumper.