I toured for a couple of yeas on a Aprilia Tuono V4 APRC. I love that bike so much. The aprilia extended screen and threw some Kreiga packs on it and off I went. Did a couple of 3000mile trips on it.
However the one big issue with it is tank range. It only did 80miles and the fuel light would come on. This is OK in the mountains where 80miles can take a while. Trying to get anywhere on major roads is a real ball ache. Its never let me down in the 4 years I have had it.
Also I would not be that keen to sit on the back of the thing 🙂
I now have a S1000XR like allthegear has, the nearly 200mile range is amazing and takes a huge amount of fuel anxiety off me. It also has solid panniers and a top box, so its hugely practical. It fast and handles well. Though it did let me down in Spain last year on its first trip when the ignition switch failed and it would not switch off.
However it does not have the X factor the Tuono has. You really feel you are riding something special when riding an Aprilia V4. If it had a bigger tank or drank a lot less a new Tuono Factory would be in my garage.