Oh... yes, I know the Akros are VERY nice and VERY expensive.

I can't see the pic you attached, but I am assuming you are showing the slip-ons? In the US they run around $1000. Pretty pricey, but a nice (probably THE nicest) exhaust made for the Duke. Some Duke owners are modifying the stock exhaust and getting a decent improvement as well. Depending on what tools you have and experience with welding, you can do it yourself for around $100. You can send your stock exhaust to someone to do it for you for around $300... not too bad, but it doesn't have the look of the pretty Akros either!