I got the CST 7 and love it. Remember though 7" lift on our 2wds is going to look different than 7" on a 4x4. In all honesty, If I were to compare my truck to a 4x4 lifted truck, my height is closer to a Country 4" inch lift rather than a 6" Rough Country lift. If you want more lift then you're going to need to add a 3" body lift.
Look at this video man. He's got a 7 CST with a 3 PA body lift. he's only got 35s with a 20x12 wheel. If you watch this video and look at the comments he talks about he would rub at full lock if he had anything bigger than 35s. Which leads me to believe that you WOULD rub with 35s on a x12 wide rim with ONLY a CST 7. If you had a body lift. Different story