But what to do with the old ones...
sometimes I don't like to talk tires because it's like talking about which is the best oil to use and everyone has different opinions and most people have different riding habits and needs.
I love Pirelli as a whole,including car tires. they take me back to when I was a kid and they were standard equipment on high performance vehicles. Michelins are ever popular as usual and also command top $.
...but I find there's a brand that some ignore but they really shouldn't. Metzeler. I put a set on my aprilia and was rewarded with great handling,precision,grip,confidence and long life. i'm thinking for your bike the Roadtec Z8 Interact. tires are all about compromise,..for a little more grip but shorter life,the Sportec M5 Interact but it sounds to me that for you,the Roadtec would be better.
don't underestimate metzeler because they're not the tire that every kid and their posse wants on their bikes,which is usually Michelin or Pirelli(both for good reasons though,not taking anything away). metzeler is a german company that does top notch R&D and T&E with high technology and specialize on motorcycle tires. their history goes back literally to when the motorcycle was invented. their more recent fame,some decades ago,came when nobody was able to satisfy many custom cruisers who wanted a really fat tire at the rear,metzeler had the technology and the tire,...more recent fame also came from racing with their racetec tires and CompK compounds and have won countless races for individuals buying their own tires.
anyway,well,there you go. opinions vary of course but I was surprised how good they were when I first used them.
strickly my opinion but I would only buy motorcycle tires that were made in the USA,germany,france,Italy or japan,..or if the actual production was somewhere else,extreme quality control but the science from these countries.