Just pieced together an OME/Bilstein lift and that came to $706.99 before shipping and tax on Jeepinbyal's site. Then you figure you're gonna have to add another $20-30 in bumpstops. It puts you in a little cheaper than the ~$750 OME kit(which will then need the extra$20-30 for bumpstops). I didn't include assembled struts, just a heads up. I went with just pure parts.
Honestly, if you go with OME 927 front springs, and OME 731 rear springs, you're gonna be looking at a harder ride than stock. It's not going to be jarring, it's just going to be stiffer. Most actually prefer the ride with the HD springs. An added bonus is that it will handle better than stock as well. As for height, you will get 2.5-2.75" of lift with those springs. And at that height you won't "need" a-arms. They would help, but if that's not something you can afford or want to do yet, you can save up or do as you please and do them later.
And if you ever wanted to go higher(3-3.5" of lift) after the original lift, you can. That's easily done by adding a clevis(I did a 3/8" clevis, pretty much the largest you can comfortably go), and adding JBA 1/4" top spacer plates. In the rear you buy 4 rear isolators and add 2 to the top on each side(total of 3 top rear isolators per side stock + the 2 new extras). With all that said and done, you'll sit anywhere from 3-3.5"(depends on your clevis) and will sit level, or very slightly nose high(with a 3/8" clevis). However, you WILL need a-arms if you want to upgrade to that height.
Oh and as Tom said, the lift is very easy to do. The hardest part(well most annoying..) is the a-arms, but if you stick with the springs/shocks you won't be doing that unless you choose to.
2011 KK - Skyslider - JBA Adjust-A-Strut - OME 731 - Bilstein Shocks - JBA UCA- 245/75-16 Duratracs