I had a Kaymar on my 80 at one time. Went through the Rubicon twice and did fine (though obviously not as well as a Slee or equivalent). It drags mainly because it has an integrated 7000 pound rated tow hitch. Which actually makes it the strongest of all of them, without exception, in a rear end collision. Also, their design is the best if you'll be doing mainly expeditionary-type wheeling. As far as their latch being inferior, I beg to differ. In fact, IMHO from seeing and using all of the common latching systems, the Kaymar is the beefiest and most able to take major impact. But that does make it a bit of a bear to open and close, which is a downer if this is a daily driver and you are in the back cargo area all the time.
TJM is OK, though the steel is a bit thinner and I'm not sure I like the idea of rubber bumper caps (upside of all that is less weight). Advantage over the Kaymar is no integrated tow hitch. If you need to tow or put on a bike rack, just bolt on the factory tow hitch. If not, keep it clean and you get slightly better departue angle than the Kaymar.
That said, I currently have no bumper because I am in line for one of Luke's 4x4 Labs bumpers. Since this truck is no longer an expeditionary truck (at one time that was its sole purpose, which is why I originally had the Kaymar), it's gonna get a true rock-crawling bumper. Not only does Luke cut off the rear crossmember and shorten the frame rails by about four inches, but he also angles the bumper to the new departure angle, giving it the tightest angle around. And, of course, being that it's Luke, the build quality and stoutness are beyond reproach.
However, the 100 may one day get a Kaymar since it has now inherited the role of expeditionary and family camping wheeler...
My $0.02,