First, never buy DOM tubing for any suspension pieces, always use Chromoly.
I just installed a Whiteline double adjustable panhard bar after lowering my 14. Other than not reading the instructions and putting it in wrong, it was easy and brought my housing back to the center of the car.
As for the bend, I saw the BMR double adjustable bar (just like the Whiteline) and it didn't have a bend. Are you sure you aren't talking about the panhard bar brace which goes between the brackets?
You really want the panhard bar to parallel to the road surface when the cars suspension is fully loaded, so I would see no reason for a bend................I could be wrong.
Unless you are going to be racing I'm not sure you need more adjustment than the Whiteline provides in the relocation bracket, plus they have a little more support.....I will use them. Also, when you buy the UCA, be sure to get the support bracket if you buy BMR, Whiteline already supplies theirs with a welded support.
I would stay with one brand unless someone can show me why mixing brands would be better. I personally like Whiteline and have found over the past ten years that a lot of performance parts that come from DownUnder are just as good and in a few cases better than good Ole USA.......IMHO