I have the X2's and Steeda bumbsteer. I am running the spacers that come with the balljoints since I have no ISO's in. I went to a well known suspension alignment shop in my area for my alignment.
Just that x2 (without the spring spacer) will lower you another ~1/2" on the front. .1/4"-3/8 really.
I have MM bump steer and installed per Steeda instructions.
Make sure you use/keep all the spacer rings on the Bump steer.