I'd say you have enough experience to handle a 600cc sportbike. If the CBR is the one you want, I'd say go for it. It's really a good bike, if you want a sport bike, it's just not for beginners. But you're not a beginner.
Triumph is also very nice. English bikes have a distinctive character, and a lot of people prefer them. I think they're a bit more expensive though, and not as reliable as Japanese iron. The Triumph might be cooler, might get more attention, but the CBR is probably a better, more reliable bike.