tundra shell no rub

I had a tacoma with a century shell on it and did a little 4 wheelin. I monuted it back as far as I could but it stilled seemed to rub on my cab. I'm looking for a shell now for my tundra and plan on doing a little off roading...nothing too crazy just the norm...and don't want it to rub again. Any suggestions on a shell thats sits away from the cab a bit?

Willie