Hi Guys, sorry for the delay. Firstly, to answer your question, no I did not check the Larini system. The reason being that the quicksilver system seemed to be one that a lot of Aston owners were using, and one that my dealership was accustomed to fitting. That what’s made me make the decision to go with Quicksilver. The DB9 quicksilver super sports system was fitted last week. It sounds great and I don’t have the low rpm "drone" that the DBS system had. I find it has a great sound when starting and during acceleration, and then settled into a comfortable level while cruising. Hope this helps other owners with a 2009 DB9.
PS the dealership told me that Aston Martin did change the exhaust system for 2009, so my findings do not refer to earlier models