We've had the debate over DJM Dream Beams several times. There was only one guy, who knew a guy, who knew a guy that said they managed to bend their Dream Beams. So take that for whatever it is worth.
My advise to people is get what ever you can get a better price on. If you plan to bag the truck, DJM is for sure the way to go. If not, like me, don't worry about it. I have Chassis Tech's beams but I paid a fair price for them a LONG time ago. The only draw back I've ever heard about DJM is that they don't have a steering stop built in. The Chassis Tech beams have a large stop that limits turning. Wide rims with a lot of back spacing will rub on DJM while having a non-issue with Chassis Tech.
James