After getting "good deals" at a couple of places I ended up buying from Heath Diesel. Yeah, the price is high but if I had started there I wouldn't have spent that additional 8-9 hundred bucks on the 'deals.'
First set were from SS Diesel, HO Marine Delphi units. Lasted about a two years but I was getting a lot of white smoke and on test review the spray pattern was poor.
Second set were rebuilt bosch units that had suspect nozzles. Heath and I pulled a couple apart and compared them to what he knew to be genuine rebuilt Bosch units. Markings on the nozzles were completely different, hence, suspect. After 5000 miles they weren't popping even nor were the spray patterns consistent. I'm not popping the the vendor as he wasn't the one rebuilding them.
Lesson, If the price is too good to be true.... As was mentioned by someone else on another thread, with Heath, you may pay more but his customer service is top of the line.
I understand Rock Auto has them for a good price and they are supposed to be Bosch Originals. Sometimes there is a DTR discount code but I haven't seen it posted in a while.