Welcome Jay. A few things about the JK; as Jeff mentioned, pick up an evap skid, it's cheap insurance for an expensive part. Sliders are a good idea too, ACE Engineering makes a decent set pretty cheap (relatively) that hold up to the type of wheeling you'll be doing. I would not recommend the BFG's that come stock on the Rubicon.
As far as the wheel, tire, and lift subject goes, you're lucky you're in a JK. With a 2" lift you can fit 35's on there no problem. I would skip 33's all together, with the longer wheelbase of the 4 door it will improve your breakover angle. Your stock wheels have a 6" backspace, you will need a little less to fit a wider tire, most 33" tires are 12.5" wide as 35's are. You can purchase 1.5" wheel spacers, I would honestly not do that. They typically cost over $100 for a set of 2. You can pick up a set of new steel wheels with the correct backspace for your application (4.5") for around $55 - 75 each, just marginally more expensive than spacers for a better product. You can also sell your stock wheels and tires on CL for a minimum of $300 to recoup a bit of money.
I'll refer you to this thread on Jeepforum:
http://www.jeepforum.com/forum/f96/jk-f ... s-1074059/
It has answers to basically all of your questions regarding lift and tire size questions. It can be a bit intimidating at first to start wrenching on your brand new ride but I assure you it's simpler than it looks! If you have any questions or need any help, don't hesitate to ask!
Duncan