yep The Krads are a solid, reasonably priced tire. The Holyrollers seem to stick a little better on the pavement (softer command it seems). Kenda also has the new Kiniption out too, might be worth checking out.
I have the krads on my urban bike. They stick great to concrete but they slip a lot on dirt and grass, maybe its just my riding style since I'm used to dh tires, but I gotta say I always feel a little sketchy when I'm on anything other than concrete with these.
k-rads are awesome for dirt, park, street, and can handle the occassional trail ride as well. they grip suprisingly well off road but on the trails i wouldnt lean the bike over too much since they lack side knobs.