Spendor S8e or Vandersteen 3A-Sig or ?

I listened to the S8e's against the Harbeth SHL-5 at a dealer and found the Harbeth a much more enjoyable speaker, and with more bass. Electronics were Quad. In that setting I found the Spendor's boring compared to the Harbeth. After bringing home the Harbeth's, I still own my Tyler Linbrooks, however, and have since sold the others.
I have not heard the Vandersteen, only the Quatro at a dealer. It was nice, but based on what I heard in a short audition it did not move me enough to consider further listening or switching. I would have called it a more refined and scientific sound than the others. Not enough time to really give a good analysis though.

Yes, it does make sense. As many have said, I recommend taking your time; try as many as you can in your room while keeping your current speakers and comparing them against the new ones. Many dealers will let you take home a pair over a weekend and some manufacturers offer a home trial. You'll save yourself a lot of money and time if you go that route ! At the end hopefully you can find something you can enjoy for the long haul. There are so many great speakers out there... and so much depends on room size and issues (which you have) and associated equipment that limiting yourself to a couple models may have you searching again in a year or so.