the Kaymar may not be as sexy as some of the more recent rock crawling designs but does well what it has been designed for: exped style wheeling/driving.
Now, it's not designed specifically for crawling, but can certainly handle it. There are reports of Kaymars doing the Rubicon and Moab without trouble. Although I'm sure you'd hit or scrape it more than a tucked in bumper requiring to cut off the cross-member.
It is rated for 7000 lbs towing, more than a type 3, and can be run with both a pintle and a receiver device at the same time.
Certainly not a bad choice for most folks out there.
X2
I've just finished installing mine, relatively straight forward process, all bolt on. I wanted a dual carrier (tire and jerry can holder) that was rated to tow. I was hoping that Slee would manufacture a dual swing-out bumper for the 80 series like the latest design for the 100 series, which I love, but they currently have no plans to do so.
I may have still bought a Slee bumper except that they are not really designed to tow; those "hitches" that are shown on their site are meant for hanging bike carriers etc. Slee strongly advises against using them for anything else.
That said, customers regularly do otherwise, and from what I can tell, without trouble though I personally would not tow a loaded car hauler with a receiver that bolts to the bumper, or the "upgraded" Slee hitch that requires you cut a hole through the rear cross member/"bumper".
Unfortunately if you truly want a tow rated bumper, e9999 is right, there is no other bumper that accomplishes this from an "engineering" standpoint (the Kaymar has a capacity placard on it that exceeds the tow rating of the 80). He is also right about the Kaymar not being a crawling bumper, the corners are not contoured, and the hitch, which ends up hanging where a receiver hitch hangs, does cost a penalty in departure angle, though probably no more than any other bumper with a frame mounted receiver hitch installed that you should really have for pulling heavy loads.
Despite the Kaymar's apparent corner and below frame "bulkiness" it should be kept in mind that it fits tightly to the rear cross member, so it doesn't add any more overall length to the truck when compared to any other bumper that fits the same way.
From what I could tell the 4x4 Labs bumper offered the best in terms of being compact, but it requires the installer to cut the rear cross member out.
I guess you need to decide if you are prepared to pull with another bumper and have a better departure angle at the expense of the tow rating, or give up the departure angle and gain the tow rating. For safety's sake I went with the tow rating.
Happy bumper hunting...