Hey man...welcome back! And thank YOU for your service!
I live north of Denver (Broomfield) and I too have an 07 JK that I bought used last year with 44k Miles (now have 56K on it). I have the Rescue Green 4 door with a 2" lift, 33" tires with the stock 4.10 gear on the back, AEM Brute Force cold air intake, and Body Armor front and rear bumpers and tire gate.
However, before you get crazy with mods do the following:
1. Make sure exhaust manifolds aren't cracked. I had to have one of mine replaced today to the tune of $400.00 If your handy, you can do it yourself for $100.00 + Wranglers are NOTORIOUS for cracked exhaust manifolds.
2. Pour some SeaFoam in the brake booster line to get some of the crap out of the top half the engine. There are plenty write ups here and on other forums. This will help with idling issues, etc.
3. Check and see if there are any recalls or TSB's for your Jeep. Even if they say for an "07 Wrangler", it also depends on the build date of your Jeep. I know, I have been screwed out of 2 of them!!!
4. JK's are known for eating up oil without dripping it anywhere (cats eat it up). So, watch your oil every other week or so. Again, many posts here and on other forums that helped me out. It has been posted that piston rings were installed upside down in Mexico causing oil to leak through? Anyhow, plenty of write ups on this issue.
5. Check for weeping tranny lines, especially the rubber hose part that connects to the steel tube up by the radiator.
6. Clean your throttle body. Dealers want over $100 to $200 to do it, you can do it for the cost of a can of throttle body cleaner. Again, many write ups how to do it...don't be afraid to do it.
7. After your Jeep is mechanically "sound" get the SuperChip and like the previous post, maybe a 2 or 2.5 lift with 33" tires...just depends on how hard core your are going to go off road.
The above is not meant to scare you...I just want to share with you what I wish I would have known when checking on my used Jeep. Here is a good brief article from JP Magazine about the 07 JK 2007 Jeep Wrangler JK Rubicon Pros and Cons - Jp Magazine
and this one http://www.jpmagazine.com/featuredve...ing/index.html
And finally, the people on this forum are great and you will learn lots from them!! Don't be afraid to reach out and ask for help.
Be safe and get home soon!