Little PS against rolling resistance

Hello, I have to buy new summer bikes already found the right rims, now that it is driving so badly on rims, I should still have matching tires. I can’t decide whether to buy 205/40 17 or 215/40 17. At the moment 195/60 15 are mounted with winter tires and with them the car gets quite well. But now I’m afraid that this changes with the wider tires, because I have only over 100 hp. So question number 2 is which tires odell? I personally am convinced of the Bridgestone Potenza that my father on his Subaru has, but the Pirellis ( P Zero ) that my brother had on his car were also not without. Now he has Hankooks Ventus which I don’t find so. So to me it’s most important that the tire sticks, comfort, volume let’s leave everything out, I’m still young. He should actually just keep like crazy. Which tires do you suggest to me.