Small Steps
Craig,
You dont have to go all out at once. In your original post you said you just wanted the Jardines for the sound. There is no reason why you cannot just put the Jards on, buy a PCIII, download the Jardines map available free from the PCIII website, and off you go. Your triumph base tune will be fine, no need for dealer to do anything.
Once you have riden for a while you may get some decel popping but it is a 5 minute fix in the PCIII map and you will find the way to do this in other threads here - easy adjustment.
Later if you are not happy enough you can go get it dyno tuned, then even add aTuneboy on top if you wish to access the secondary options, but it will run great just with the Jards & PCIII and you should be out to approx.142hp.
Good luck....