I haven't found a tire I like better than the Dunlop Roadsmart IV's. Currently at 5,000 miles with approx 2/3 of the to-the-wear-bar tread used. Estimated mileage for me is 7,700 to the wear bars. Based on the other tires I've had on the bike with similiar usage patterns, that is a considerable improvement (I'm averaging 5,500 miles prior to these). I've run:
- Pirelli Angel GT: sticks fine, but not a fan of the last 1/3 of the tire's life. Cupped pretty bad.
- Shinko Verge: had a bad tire (out of round). Didn't like 'em when I had 'em.
- Continental RoadAttack 3: good tire right up to the end, but when they are done the remaining thickness (or lack thereof) is scary! Also it started cracking after a year.
- Dunlop Roadsmart III. I've had (3) sets. Second favorite when it comes to value, third favorite when price is no object.
- Bridgestone T32GT: stiff tire. Not as good of a ride as the Dunlops, but stick just as good. Second favorite "overall", but given that they are price-comparable to the RS4....
- Dunlop Roadsmart IV: current tire. Very happy with it. Very even wearing (most even-wearing tire I've had so far).
I happen to have a set of Metzeler MEZ8 to install. When I ran them on other bikes, they were fine. They are 1.5-2 generations old by now, but I got them for 240 shipped after rebate. I strongly suspect they'll be like the Pirelli Angel GTs. If I knew then (when I purchased them) what I know now, I'd have spent the money on Dunlop Roadsmart IV's.
My riding style, roads, and preferences are not yours but I hope this data is useful.