I agree with above comments. Also work out how much weight you'll be carrying, most companies will have 2 or 3 different rear springs. I personally have my ute riding very firm on road empty, but settles down very well when loaded with all my camping gear. I'm personally running Ironman at the moment and have previously run Tough Dog, no problems with either. I would suggest working out your budget and making a few phone calls to different companies. Make notes about what they offer, some offer little things as standard, while others charge extra, for example greasable shackles.