Not to be an a$$, but I would say the search function is your friend. There's a lot of information on here that I think would be helpful for you as you make up your mind. I hate to make assumptions, but it sounds like you are new to the JK and when I first got my jeep it took me a year to figure out what I needed (time behind the wheel, time to read, time to figure out MY needs). If you're an old jeeper and not new to the JK, just ignore the rest of this.l
I did run the teraflex 2.5" spacer lift with shock extension for a year until I decided on a more complete kit. It worked fine and got me off road better than some of the other "built" looking rigs I saw out there. Lots of companies have really cheap spacer kits that will allow you to fit 35".
Expensive full blown kits are great if you have the coin and there are lots of reviews on why one is better than the other.
Anyways, lot of great threads and even product reviews.
2.5"Tera, 34"Maxxis, Front Stubby, Cobra75, Flapless Seatbelts & Grounded Floormats