Thanks Tom. I've never heard the 5 CT's NOT sound engaging AND dynamic as all get out. I know people who don't own them say the same thing. I know that the Vandy sound of fast, clean and true mids really give them a special emotional connection for many of us. Any speaker can be equipment connected, but I often wonder how much that matters now days with all the new top end gear sounding so good. Even the gap between tube and SS is closing as gear gets more neutral.
Since the bass on the Quatro on up is EQ'd for your room, there is never a problem with the bass regardless of it being downward firing. You just put the speakers in your room where they stage the best and then you just dial in your bass. Your dealer sets this up for you so you can just relax and enjoy your music, lol.
As for the 7 mk2 vs the 5a that you are talking about.......Heck, the Treo CT's are totally different from the mids on up. The 7 is completely different from the 5CT's. Just got to www.vandersteen.com and you can read about the use of carbon fiber in the structure as well as the speakers. Similar great sound and emotional catch, but it does things much much better...but for a price, just like anything else in life. You can get the same signature sound with very low, accurate bass in the Quatro CT's and not spend an audio arm and leg. The higher you go, the more you get....