My preference is for the Defiant Steering box stabilizer, but AFAIK, Paul at Defiant is NOT making them anymore.
That being said, ALL of the SBS seem to do the job that they were designed to do, which is remove almost all of the stress that the Ram front end suspension design places on the steering box, through the steering sector shaft. In fact, the box beam design of all of them are all mostly identical (with the exception of Defiant's, which some people felt to be inferior, but I am pretty sure was actually a slightly better designed product). The only real difference in quality to watch out for would be that the quality of finish (powdercoat) may vary from fabricator to fabricator. In fact, IIRC, the early BD stabilizers were NOT finished well and tended to flake paint, though they may well have overcome this problem at some point as do not read complaints about it anymore.
I also hold no doubts that Source Automotive only carries high quality products and certainly you can't beat the integrity of their customer service!!