Best Dual Sport Tires to Replace OEM Knobby Tires

[gmcjetpilot]

UPDATE SEE POST #17 FOR REAR TIRE SIZE ON HAWK

Well just got my new Hawk 250CC and I was surprised to see the aggressive all dirt knobby tires. My main concern now is the big a$$ knobby tires on the road.... Having not rode it yet, I am sure it will be OK on dry streets...

I already Spec'ed out some Kenda K761 Dual-Sport Tire or Shinko 705 Dual-Sport Tires front and back. (ANY SUGGESTIONS WELCOMED ).

I only am going to do about 25% or less on dirt. I want to keep a set of tires under $150 for front and back.

Are these Hawk rims made for tubeless or tube tires only? If they are tube, not sure I can use the old tubes in new tires, since the size varies slightly. However that is low on my to do list. The sizes I am looking at:

Front 90/90-21 (stock is 80/100-21)
Rear 110/90-18 (stock is 110/100-18)

Comments, suggestions for some good skins for my rims...