KLE 500, NX 650, DR 650 RS or Pegaso 650?

Hello dear MT-ler, I will be sitting on the above-mentioned machines on the weekend. I have to find out for myself which fits of the size. The prices of the mentioned machines move between 900€ for the KLE 500 (BJ.92) and 1,9T€ for the Aprillia (BJ.01). I want to use the machine for: Tourers with friends, city traffic, land and occasionally commuting to work. Are there any diseases that should be paid special attention when buying? Short information: KLE 500, BJ.92, 43Tkm, 900€ NX 6 50, BJ.93, 23Tkm, 1500€ DR 650 RS, BJ.95, 26Tkm, 1800€ Pegaso 650 (Garda), BJ.01, 24Tkm, 1990€ Must mention that I am a beginner and I want to drive with 34hp for the first time/must. I.e. with all would have to have a throttle in. It is planned to keep the machine longer, as I also like to screw around myself.