Vandersteen 2ce sig II or current vand 2ce sig?? B

I am interested in purchasing a pair of vandersteen 2Ce signature II,but do i buy a used pair when they first came out or a new one? It is no suprise that richard v. continually makes minor changes to his speakers without publicizing it. Therefore, I would like to know if there is a difference in sound quality between a first run pair and a current one?
I ask this because I remember when they first came out, the midrange didn't blend very well with the rest of the sound.
Thanks,