The 2ce has a different tweeter than the 2ci in most models. There was a time when Vandersteen put the 2ci 3/4" tweeter in the earlier 2ce. Then he went to the improved 1" tweeter. The 2ce has a little better bass than the 2ci and with the 1" tweeter, a little more clarity. The 2ce Signature is a good bit better than both of these. It usually sells used around $1000.
I would stay away from the 2ci myself. I also would have to call into question using these as rock speakers depending on how loud you intend to play them. They are fairly inefficient and take a lot of power to get loud. They also run out of volume quicker than some speakers(especially in the bass). They are extremely refined, require a lot of attention to set-up, and have a window you MUST be in when listening. They have great transparency and image focus in this window and are extremely natural sounding. Not your typical rock speakers.
If I was going solely rock at loud levels, I personally would look elsewhere. They will "Rock" just not at most peoples idea of a rock approved level.
