Very similar to you, I have always had sports bikes, my last one was gen 3 s1000rr. I honestly never looked at the H2 until I rode my mates, but can agree with the other guys here that my grin went from one ear to the other, didn't give it back for a while!. It wont handle like a lighter sports bikes, but the way it makes you feel even just riding through town makes it all worth it!, oh yeah, be ready for a crowd of people around it if you go to a bike meet!!
I just purchased a late 2017 from Kawasaki, zero miles and unregistered. Not rode it yet as the weather here is so crap (sorry lads I'm a gremlin, don't like getting wet!) need to run her in first, then, like you will be looking to replace the extreme down pipes and cat.
Second hand parts are like gold dust, especially over here in the UK, and not many aftermarket part suppliers, popular exhaust parts need to be shipped over the water.
This is a great site, lots of guys giving great advice. Hope you get on with it, keep in touch.