Vandersteen 2C, 2Ci, 2Ce, 2Ce-sig comparisons

Hello
I just bought some Vandy 2Ci's, hooked them up and they sound pretty good...I think they're too close together, and too far from the side walls, but I have some Infinity 3009's 'in the way'...
I wonder if someone could give me some DETAILS on what was done in the 2>2C>2Ci>2Ce>2Ce-sig history ?
I'm curious as to what a 2C would sound like (or 2Ce-sig if I could fine a pair not too much $) compared to the Ci.

Already been to vandersteen.com (and all over with google) but found little there...

TIA