We own a 2012 XLR 300X10. Its pretty well made (had just a few things to fix after delivery) but as far as I know, all of em cut corners on stuff. We haul dirtbikes via EZtrack that I installed in the back, but when I had the underbelly down to fix something, I noticed that the tie downs they installed in the back were bolted into the frame of the rig. Seemed pretty secure to me...but mines a 2012 so who knows what they're doing now.
Heres something that annoys me on mine...I have 2 fuel tanks. An 18 gallon one for the generator and a 30 gallon one for toys. Of course, there is a fuel pump on the 30 gallon tank, so I can pump out of it, into the 18 gallon tank and keep my genny running. BUT, I have NO WAY to get fuel out of the generator tank.
I'd be interested to know, if the trailers you're looking at have 2 fuel tanks, can you move fuel both directions or only one like mine. Even if I put some sort of drain on the fuel line to the genny, I think I've got to pump it out as if I were priming my genny cuz the fuel line isn't gravity feed.
Heres another thing....compare pin weight. On mine, I think the axles are just a tad too far forward. The result of this is my pin weight is a little on the light side, so I load it front heavy and its ok even with bikes in it until I totally fill the water and the fuel. Thats when I wish the axles were further back cuz it likes to weave unless I tow it super straight...which gets tiring and is pretty much impossible to do all the time.
NOTE: My fuel tanks are both in the back beginning just in front of the spare which is under the floor of the trailer and in the very back. In front of the fuel tanks is my 100 gallon fresh water tank. As such, it is about 80% behind the rear axle. Once it all gets to sloshing, it wants to wag the rear of the trailer. (mines a 2 axle rig...didn't want a 3rd cuz it drags too bad on turns)