Hello, Myself and my 2007 Wrangler unlimited 4 door Sahara have a suspension kit I purchased from KORE who is in San Diego, CA(USA). The kit cost $1,200. Their primary products are baja suspensions for the Dodge Ram pick-up trucks that have the hefty Cummins diesel motor installed in them. However, for a short time they were selling a suspension kit for the JK Wranglers 2007-2011, so i decided to purchase one, as i liked what they did for the diesel trucks. Anyways, after installing the suspension I noticed a substantial difference in better handling, increased wheel clearance, but a decline in gas mileage. The ride is much better than factory and the lift increase was about 3.5-4 inches(not sure the metric equivalent??) which helped the clearance issue of the lower factory ride height. Also, the kit allows for much larger tires to be installed on the Jeep, about 35-37 inchesUnfortunately, i checked the KORE website the other day and it appears they do not have available/sell the suspension kit for the JK Jeeps at this time. But, to answer your question, I investigated several suspension kits prior to purchasing the KORE kit and let me tell you not all of them are created equal. Most kits are low in quality and what really affected my decision was how little testing the manufacture did prior to building the suspension kits. KORE appeared to do a lot of testing prior to building and did not concentrate much on the overall looks. None the less, the kit was well built and came with Bilstein shocks or Fox shocks, depending on what you wanted. My other choice of suspension kit was the AEV kit(american expedition vehicles). This came with more items and had the same Bilstein shocks included, but cist $1,600. Anyways, hope this helps and please do not buy a $400-600 kit, as I have known several friends that have and are very unhappy with the results and performance.