Just go with what ten thousands prior to you have gone with. It would be hard to say they are all wrong.
Here's what I see about tires. When I go on rides I see Dunlops on bikes where the rider is still on his first bike and tires and has not used anything else. Those that have been around for a while and have lots of road miles
Which leads me to ask again: What tires did Honda put the bike at the factory? What make and model of tires are on a brand new CBR250R?