So what was the shop's concern about Brembo's? Was it a fitment issue behind the wheel? I'm going to have to replace the brakes probably in the next 15K miles or so and I'm looking to upgrade to handle the additional weight of the tires + Borbets + two cargo carrier "tanks" ( JAMAS) but I don't know a lot about big brake packages, etc.

Looks like you've got a good option there though!