RH 28mm tires
I have used the standard RH 28mm tires for a few years. Ride is nice and feels fast. Easy to mount. I have also used the Continental GP4000 sII tires in 25 mm which measure at 27.5 on my Velocity A23 rims. The Continental's feel as fast but a bit harsher and are much harder to mount or change. I am now on the Continental GP5000 sII's in 32mm which I feel are as fast. I use the 28mm RH tires when I am running fenders as the 32mm don't give a lot of clearance on my bike if I mount them with the fenders. The Continentals have a bit of flat protection. The RH tires are nice but a bit expensive. I got 2 Conti's with tubes for around $90. Hope this helps. Conti's seem a bit taller.
Jim