New entrant – which racing machine?

Hello forum, I am the Frank, 28 and at that time together with the car also made the motorcycle driver’s license. But I have never driven since. Because all my friends drive, I now also need such a heater. So I don’t like any tourers or choppers, I already need a racing machine. So far I have tried on the bikes of my friends, so Fireblade and Ninja. They were quite cool, that’s what I want too! But I don’t want to limp afterwards. Budget has What do you think of them here? http://suche.mobile.de/…/showDetails.html?… http://suche.mobile.de/…/showDetails.html?… http://suche.mobile.de/…/showDetails.html?… Are these serious offers? Should I rather buy from the dealer, or can I fall into it just as much as with private? And again in my own business, starting from small I don’t want to buy so much, I don’t want to buy twice. I don’t think that’s anything for me, I want to buy something like that. 170 hp doesn’t sound so impressive now, when I drive under 250 hp I don’t get a chance at all, which of the 3 bikes would be the most beginner-friendly? I think to have read that the Fireblade is the most comfortable. My buddies also do bigger day tours on sunny weekends, so up to a maximum of 150km. I would like to endure this without any pain, one of you may have such a motorcycle and can report something about it. Thank you and see you soon, your Frank!