Vandersteen Treo vs 3A Sig as upgrade

I am following this thread with interest because I am considering both the Treo CT and the Quatro CT.  I have an older REL sub that I have been using with various stand mount monitors over the past 15 years.  I have been totally pleased with this sub setup and am considering the Treo/REL combo vs the Quatro. I know there is debate between the REL sub recommended hookup method vs Richard Vandersteen's.  I understand the merits of both approaches and that is not really the point of my post. Assuming I keep the REL sub and let the Treo run full range is it likely that the quality and amount of bass will be on a par with the Quatro and its built in sub?

I realize that all speakers are not for everyone.  However, I seem to see this statement made in association with Vandersteen speakers more so than with other brands. I have even heard people say that either you love them or you hate them. Is my observation accurate?  If so, what is it about Vandersteen that would tend to make them less universally liked than with other brands.

I think I did overstate the issue somewhat by describing unimpressed listeners as "haters".  I was clumsily trying to point out that there does seem to be somewhat of a polarizing opinion about the sound of the speakers.  I think your explanation makes sense and probably applies to sound of many components/systems.  The type of sound that grabs your attention at first does not necessarily hold it for the long term.

I've scheduled an extended audition  of the Treo CT and the Proac 30R next week.  The same dealer carries both. I am narrowing my choices to these two...at least for the moment.  I will report the results of my listening session.  I'm in the process now of selecting music.

Dallas....and I will listening to the "R" version.  I had a pair of Proac Response 1sc for an extended loan about 15 years ago.  I loved the sound of those little stand mounts. I have been interested in auditioning the larger Proacs ever since.  I haven't heard the Treo in a number of years..and it was not the CT version.  I don't think the dealer in Dallas has a pair of Quatros to demo at this time.