The 1's 2's and 3's have a certain sound that is impressive at first, big , open, dynamic, but after a while it bothers me, I can't actually put my finger on it, but it lacks..love..if you know what I mean, technically they are great but they don't emotionally move me.
The quatro's are a different animal, much better, setup right with the right gear they can be great.
The 5's, lack some of the animalistic punch of the quatros, in favor of being way more refined and textured, layers I am talking about.
I was in love with the 5's until I heard the Proac D38's setup in the same room as the 5's, game over.
Everyone I brought there said exactly the same thing, WOW, The big Proac's just excel in musicality, they will romance the credit card out of your wallet so be careful.
I heard the Proac's with Quicksilver mono's, AR ref3 pre , and AR cd7. Mind bendingly great!
Also with Primare integrated and Primare cd player, obviously not as great as the above system but still very good, so good people preffered that cheaper system to the 5's with the AR reference system that was powering it.
For me the D38's have it in spades over the Vandy's, but that is what I prefer, and to all the people that were there they preferred the Proac's, but again the Proac's were to their taste, some will prefer the Vandys.
The 7's are a whole different animal, they smoke the whole Vandy line, but I would love to hear a pair of the 5's with those drivers(which is coming soon)that might be magic!