One of my buddies has a 4-banger and was in your situation. The best combo that we found was a 4 inch. I would go with a skyjacker due to the great ride quality if you are doing mostly road driving. This will totally clear 31" tires, which are about the limit of a 4 cyl.'s capacity without a serious gear upgrade to around 4.56's or 4.88's. Also, the 4 inch gives you the ability to clear 33's in the future if you ever feel like doing a gear swap to push them, which is what we did to my buddy's jeep. We also put in a 2" body lift, which totally clears 33's. Dor what you want to do with it, a 4 inch seems to be the most versatile.