natesjeep, think about this. You mentioned you will move up in the future. When is the future? A year, six months? If its going to be under two years, then I recommend not spending anything right now, saving your money and buying a larger kit when you are ready. This will save you twice the work and a lot of money in the long run.
If you truly want just a budget boost or you really want to lift it twice or buildup just for the experience, then do the rocklizard budget boost, its easily the cheapest route to get a stable on and light offroad platform.
Instead of lifting the rear with shackles though, add both the main leaf and the second leaf from the donor pack instead of just the main leaf. This will give you exactly 2" in the rear and means you don't even have to take off the main leaf from your jeep.
Use v8 ZJ Grand Cherokee coils and add a second set of stock coil isolators. This will also give you 2" even in the front.
You can run stock shocks for a while on this, but like others said, it will be a bit mushy in the rear. Using the same upgraded shocks that he describes on the rocklizard site will give you the longer shocks you need and will be adequate for a 2" lift. The whole package can be done without shocks for between 50 and 150 bucks depending on how much you pay for the coils and donor leaf packs. New centre bolts and spring retainer clips should be under 10.00.
You can easily fit 30" tires on a 2" lift and 31's with some mild trimming.