I looked at a set of Ram tube bumpers (like those you are looking at on Ebay) that were mounted on a Jeep last summer when we were up in Big Bear. I was not impressed by the quality or materials used to make them. They seemed rather wimpy. The tubing seemed small and looked very light weight. I don't think that they would hold up well if you hit something with them. (And by the way, the receiver is not rated for towing at all.) I guess the big question is: what are you looking for, form or function?
I went with the SRC bumpers. They are very well built and look very strong. The rear has a class 2 rated hitch receiver. Got the rear last week (paid $150 on Ebay, it was local so I didn't have to pay shipping) like this one:
ebay link It's now over at a friends house, he is building me a tire carrier for it.
When I manage to save up another $250, I'll buy the front one.
ebay link