I've run Bridgestone BT016 on my SD and they work well on and off track. A little cheaper than S20, but the S20 is supposed to be much better on track. The R10's are supposed to be much better than the S20's. If I was looking to get a new set, the R10's would be at the top of my list.
Dunlop 211 GPA are super grippy, but wear quickly and unevenly. I ran them once at a track day, and was like my god so much grip, go faster. Way more grip than BT016. At the end of the day the tyre was looking ragged and blued along the edges. I ended up selling that bike shortly afterwards with the GPAs on it (03 yamaha r6 track rat). I guess my friend was so impressed that I lapped his ass so many times he just wanted the tyres and took the bike with it.
If you plan on doing track days and don't ride in the rain much, you might as well get DOT race tyre. Who cares if you have buy a new rear tyre after 1 year instead of 1 1/2 years, better to have more grip for those miles while out on the track. Typically front tyres last twice as long, so buy two rears and one front, and you might get a bulk purchase discount. I know plenty people who run DOT race tyres on their daily commute without problems, then take the same bike out on the track and rail around. If DOT race wasn't made for the road, then why did they make it DOT? I wouldn't worry about not getting enough heat into a DOT race tyre for daily commute and all that b.s, not like the extra tackyness will matter going a whopping 60mph.
http://viets-performance.com/Home/Bridg ... 180_3-Pack