120/80 (or 90) in the rear for me. Fits the rim better, easier to lean the bike way over, wider contact patch than stock. Best compromise, IMO.
AM26 Roadriders are good tires- sticky, good wet traction. You pay for it in tire life, rear will be done in less than 10k. I'm on a 2 year old (~20k) front now, though. Probably go 3 rears to 1 front.
D404 Dunlops are harder wearing, but less sticky. Also has good rain traction, but in my experience the D404 slides around a bit more than a modern tread.
Pirelli Sport Demons are another good "modern" tread choice.