I’ve used Michelin pilot roads for many years. I’ve generally found them decent and they seem to last well tho’ a rear puncture has made it hard to be certain. Your own 8k with Dunlop’s sounds a decent lifespan tbh (for reference I got 10.5k from pilot road 2 front and 6k from rear when rear puncture intervened and I swapped both. Rear still had plenty of tread at that point but they do tend to wear faster than front I think, so doubt I would have got to 10k with them).
I put the latest pilot Road 6’s on last Autumn and initially found them a bit twitchy tbh but that was probably adjusting from squared off old tyres as I do a lot of motorway miles travelling to see gf! I like them now I’m used to them. They are reassuring in the wet and the dual compound is meant to make them last well, we shall see.
However, I’ve not used other brands for many years so who knows if there are better out there as I have no recent experience with other brands to compare with. I’ve used Dunlop's ages ago and was happy with them too!
Probably any sport touring tyre offering from a name manufacturer like Continental, Dunlop, Metzler etc, would be similarly good (or better) so long as you choose the versions designed for bikes with the the S2R’s weight (ie avoid the GT versions meant for heavier full on touring bikes).
I stuck with Michelins partly for familiarity, partly as I got a decent deal and partly as I live in Belgium so Michelin is an easy brand to find anywhere around here (eg if I get a puncture and need a matching tyre in a hurry).
So I’d suggest pick a standard sports touring option from a name brand that’s readily available in your area with a decent price. Going for the version a generation or two back can save money and you’re not likely to notice much difference tbh (my gf recently put pilot road 4’s on her bike as she got offered a super deal and she’s happy with them),
