X3. Go with the 4.5. I have these wheels on ENVY and that's what I went with.
Also note that they use the offset measures and not BS measures. DT had a conversion chart in a thread somewhere as the two are not exactly apples/apples. With the -12 offset running 37" trail graps, I was rubbing the rear sway bar links ends on the tires. Added a spacer and problem solved.
If you like the look of the wheel, then you'll love em. I really like the ring guard feature, which is unique to any other on the market. Also like the recessed valve stem, which not all offroad wheels have. DTD pricing also made these a great deal as I couldn't afford slabs along with all my other build needs. :twocents: