Nester is on right on the money. He is the one who suggested the set up I have, and introduce me to Danny who was getting rid of the RE BB.
The simple answer is this...
You have 30s... you can go 31, but it wil be a tight fit and may rub on big bumps.
If you want to go up in size you basically need to figure out where you want to go... 30 to 33 is 3 inches, so you need a 3 inch lift at least.
I loooooooove my set up. I get a lot of flex on trails, it looks like a real jeep should, and it gets me where I want to go on and off the trail.
I am running an 04 Rocky Mountain Edition (X with a 44 rear and pretty colors inside... I got it because I could not aford the Rubi, but wanted the 44 w/ 3.73 gearing).
For lift I went with the Rubicon Express Budget Boost (BB) which is a 2" suspension lift. Super simple install... if you can stack Legos, you can put this together.
I tacked on another 1.25" JKS body lift. This is also a good investement for future upgrade because most skids suggest a body lift (Kilby Gas Tank Skid and Terraflex Belly Up to name a couple).
In hindsight I should have gone with the 1" motor lift at the same time... I will be doing that in the near future... (It also helps with future projects, and means less modifications to fan shroud, t-case lever, etc. when you lift the body).
Anyway... back on track...
That set up lets me clear 33" BF Goodrich All Terrain TA tires... 33x10.5x15... excellent on the street, and better than stock on the trails (Super in the ice/snow runs)
With the 10.5 I get a bit wider stance than stock, but didn't have to buy new flares to cover the meat.
I think another benefit some never take into consideration when off roading is I put more pounds per square inch to my obsticles than 12.5 because it is a narrower tire... which can have its plusses and minuses (less side wall support for 1 so the tire flexes a lot more than a 12).
You will also want a sway bar disconnect system to unleash the beast if you plan on trail running.
One last thing to consider on lifts... suspension lifts change the steering geometry... even a 2" has effects... make sure the FIRST thing you do is get an alignment!!! Body lifts raise the center of gravity more...
Being all honest your best bet is a combination of the 2.
With my set up I never had a tire rub issue (until I shifted my axle 2 inches... oops)... stuff the tires quite nice when I want to... and it looks sweet next to the stockers at work.
If you want a hand installing the kits I am very willing and able... it only takes a few hours, with basic tools (wrenches, jacks... if doing Body Lift you WILL need a Hi Lift Jack)
if you want to look at mine up close sometime I will meet you someplace and you can see if you like the setup...
As for pricing... give Randy Wood a call... I got the JKS body lift through him at a great deal, and he also had the parts I needed for the BB.
Hope this helps. If you need more info feel free to ask me.
By the way... Black and Blue is my Daily Driver too... in answer to question 1 of yours... It gets a lot of attention at work and in the yard, but that is good because everyone knows its mine and they keep an eye on it for me, along with look to see "Nooooow what did you do to it"
Tony