If that's not the current version of the Model 1 and you like them then an upgrade to current would be my first thought and look for a used sub. Next step would be used 2CE Sigs as Focal and Vandersteen have nothing in common sound wise.
Vandersteen Model 1 or Focal 726
I have Vandersteens model 1s. They are in great condition inside and out and I'm fairly happy with them. Due to my new stereo fever I am considering purchasing Focal Chorus 726 speakers but I'm not anxious to spend $2000 if there is not much difference in sound quality. If that is the case, I'd stay with the Vandys. Any advice would be greatly appreciated. Doug