If you are looking to pay a little more for GOOD tires I would highly recommend Schwalbe Super Moto-X 26x2.4"
Noticeably low rolling resistance, highly rated flat protection (maybe the best, but you should still run Slime) and they offer a great ride.
They're much less expensive on e-bay
Earlier 'Wagons run 26 x 2.3. It's just the newest model that runs 22"