Tried out this 4WD truck sent by the guys at LightInTheBox.com to have a play with. Never tried a crawler before. Certainly got some power and some big travel on the suspension. Worth a look if you want an all in one package (with the exception of the 6 x AAs).
Non-affiliate product link: http://f4k3url/TiJM1H
http://www.youtube.com/watch?v=d-gcj6RSdhA