One quick note.
For those of us that spend a lot of time at speed on the freeway, the 'Wing' sized tires also help with stability/buffeting around big rigs. The extra weight of the tires has a 'gyroscopic' effect that helps keep the bike more stable.
Of course, I went directly from the Dunflops to Pilot GTs (now discontinued). That being said, my Venom rear has been a suitable (but not quite as good) replacement for the GT Rear.
Going with the 'Wing' size on the front helps correct the speedo error. Most Connie speedos are about 3-4% off, and the 130/70R18 is about 3-4% larger, so this puts the speedo almost dead on in this case. The larger rear (160/80R16), as noted above, drops your rev's slightly (again, about 3% or so), which helps reduce the speed threshold where the dreaded handlebar buzz gets really noticable. But that's another story. Plus, I like the higher mileage these tires offer (don't need to change out the tires as often). Oh, and the 'getting bike on center stand' easier thing too!
I'm very happy with wing size. But then I'm looking for touring characteristics more than sporty characteristics. We all want grip though. It sounds like you are looking for a 'touring' tire, not a 'canyon chasing' tire, so I hope this helps.
The PR3 suggestion on the front intrigues me, but only if they come in 'Wing' Size. Otherwise, I'll probably be trying the Avon Venom on my front next (depending on availability at that point), and will let you know how the matched pair performs in the coming months (I still have a GT on the front, the last one lasted 19,000 Miles).
BTW, I've heard horror stories here about the Metzeler's (880's?). They are a high mileage tire, but their gripping/rain performance has been reported as subpar by several forum members.
FINALLY, and I've said this before in other threads, the Dunlops are not a well performing tire, and are holding your bike back. It is amazing how putting almost ANY other recommended tire will change how much better the Connie performs on the road. There are other bad choices out there, certainly, but pretty much ANY tire recommended in this thread will likely give you a better bike in the end.