The main problems withe IFS lifts tend to be either design flaws or operator error. I have been running a Trailmaster 4" on my '90 since '94, it is a daily driver and was my main trail rig which I wheeled moderate to hard trails in the past, w/o anything failing other than bending an idler arm or 2, or 3, or... It is also heavier rig than most, w/o passengers or camping gear it weighs over 4600lbs, when loaded for the trails it weighs just under 5300lbs. I don't try to baby it when on the tails but then again I don't feel the need to bash my way up trail either. If I can't get one line I will back up and take another, or stack a rock or two to get through. Throttling down will almost always lead to breakage regardless of being an IFS stock/lifted or stock SA rig.

Before buying a lift you need to determine what your end result will be. If you want to run 33's on moderate to hard trails and don't want to bash through like you see in magazines/TV shows, and still have a nice highway ride, then an IFS lift will be fine. You may also want to consider a 2" body lift and some 1.5" jall-joint spacers. The BL+BJ approach will be far cheaper than either IFS lift or an SAS. It should give you the ability to clear 33's w/o rubbing/sheet metal trimming, and the time to determine if you want to go with bigger tires, and if your wheeling desires require a SA rig. However if you figure you will likely want to take the throttle down approach, turning 35's or bigger, than an SA with all of the aftermarket SA upgrades($$$$$) is mandatory. Anything else would be a waste of money