I've got a line on a nice really heavy 5th wheel, but I think it'll eat up too much payload to be useful behind a 3/4T. Price is right if the condition is good that I might buy it to flip. The guy also has a 16' SS trailer for reasonable money. I might buy that and stretch it.
There's some other really heavy trailers out in the 5 state area that could be good for more weight than the pickup will pull, but for now I'm only looking for something that'll get the tractor and implements around as needed, and haul some lumber too.
I'll keep ya posted.