I actually like the Tuono but I wouldn't buy one due to the lack of a real UK dealer network.
Personally I'd go for the MT, but I'm biased. Did you also consider the Superduke GT?
I was kinda looking at it but Ive had nothing but twin sport bikes so I was kinda leaning towards something a bit different. Plus the KTM support where I live is terrible...worse than Aprilia.
I'd say try em and see what is most exhilarating. The Superduke GT, Tuono and MT10 all seem appealing. I do hear the MT gets awful gas mileage. But maybe I'm spoiled with my Buells.
For whatever reason, getting test rides where I live is like pulling teeth. They basically almost need a commitment to buy the bike before they let you ride it.....except for one dealer, but they dont have KTM, Aprilia, or Yamaha!