I have no experience with the Teraflex kit.

The RK kit is ment to be a lift kit, not a leveling kit.

If you want to use the rubi shocks, they should work with either. Its going to come down to how tall you truly want to go.

For me, the deciding factor would be that the RK kit allows 35s with cut flares. You will want 35s later... It just happens. And cut flares look great...