I have 8k on my rear Dunlop and have about 4/32", maybe 5 left... It's a TC. I run 40psi front and rear- the front has 3-4/32" left and I expect to buy the next as a pair when the rear will have about 12k it.
I ride two up with a 100lb woman and all our junk on weekend jaunts, and while I don't ride excessively hard, I sure don't baby it, either. I go about 185 and carry about 20lbs of crap around with me solo this time of year, since my enjoyment of my scoot supercedes my need for an air-conditioned cage...
As for wet handling... I live in Florida, the Dunlops wear long in comparison to a softer-compounded, sportier tire, and I tolerate and compensate where the less than optimum wet-handling characteristics of them come into play.
Remember that significant seasonal temperature fluctuations will have an effect on your air pressure. If you keep up with the tire gauge you will certainly enhance the longevity of your tires.
Happy Motorin'! -F-