I just purchased a set of Toyo Proxes S/T for my 20s. Should arrive next week. They got great reviews and the threads look a lot more aggressive than the Diamaris (plus a little cheaper). They even are supposed to do well in light snow, so I'll see if I can ride these year-round.

If you can get past having non-OEM tires, I'd recommend them. This was the hardest part for me since I'm a huge Michelin fan.