Help to make a purchase decision for first moped

Moin, I’m new here in the forum and in general I don’t have any experience with forums, but I’m just trying: I’m still riding 125, but after the winter I want to do A2 and then I can buy a fat one.However, I have some problems with the purchase decision and ask for help. As a budget I have the highest so 4000 Euro. I have always been for a cbr 600 rr from pc 37, because it is often and cheaply to find. Of course, the coolest would be a completely new cbr 600 or ne new r6 or so but that falls away with the budget ^^. I wouldn’t have anything against a naked bike, but the problem is that you only get the older things for the money, where the back is always so ”fat” or the light so round ( old halt ). I find the new ones good, like e.g. the new cb 600 hornet or the yamaha mt-09 or ne Duke, but they are also too expensive.Have already thought about remodeling an old machine to ner art streetfighter (but without such an uplifted rear), but have Therefore super sportsmen, because the cbr 600 rr looks still relatively modern (in contrast to others in the old one ). The Yamaha r6 eig. also falls away, because one finds the new ( with the sharp heck, believe from rj11) only approx. from 5000-6000 euro. The r6 rj09 is also quite good, but also quite expensive and the fat, endlessly long exhaust I find very ugly. So I land again at ner cbr 600 rr. But the things are suitable as beginners and in addition still g (one 500 ccm out of the question) FREQUENCY ON YOUR MEETINGS AND COUNCIL DECISIONS 🙂 Thank you in advance, Sirlanzelord