Use of subwoofer with bookshelf speakers

Thanks, Tonyangel. I agree that Vandersteen's advice seems a little odd and that's what prompted my question. I think that I could live with the Canalis speakers by themselves because I am using my stereo system mostly for guitar music and light jazz. However, we do have our TV in this setup and we do watch movies and some of these need the lower frequencies for realistic sound. As far as choosing the main speakers first I can only say that I have made my choice in these by Canalis so, you're advice is appreciated.

Johnnyb, I like what you say about the relationship between the bookshelves and sub, especially as regards mating the acceleration of the fast fast 5" woofers in the bookshelf and relatively fast acceleration of the Vandersteen sub speakers. This speed was my reason for buying this subwoofer years ago, in the first place. The other responses are valid and much appreciated but I, at least, have a bit more confidence that the Vandy will work out as I very much enjoyed this sub when it was in use with my Focals and I would like to minimize expenses as much as I can. It will be awhile before I can justify/afford the speakers I want so I have time to kick this around for a bit. Thanks.