@zlone I have two reasons:
I have heard Vandersteens at dealers and in homes. I was never impressed. It was lean, dull, mediocre sound. There were details and dynamics but it felt - for a lack of a better term - just for measurements’ sake.
If you liked them, you should absolutely ignore me.
I also have the Ones and I like them a lot. They sound way better than anything else I had heard from Vandersteen. The setup is also different, it’s a small space. They are not my primary speakers mainly because the tweeters are way below my ears.
I had a friend over at my house who is about 10 times more knowledgeable than I am. I asked about this paradox - Ones in a small space - good, new models in bigger spaces - not so good. His take is that the Ones were a simple and lucky copy from another brand, way back when. They work very well. However the next generations didn’t get anything right. They have more drivers, more expensive components, but there is no design and synergy that yields a better sound.
It sounded credible to me but of course I have no facts to back it up. Obviously my friend does not think highly of Vandersteen. It matches my experience that I would never want anything other than the Ones I have.
I am a monitors+sub guy, I don’t need big sound, big space, I want sound that moves me, sound I can connect with. I am also low budget, the Qln 3s are very high end speakers, and I don’t know anything that’s better (from personal experience). With your budget you can try a lot of speakers - hence my list, based on numbers, reviews, sessions at friends’ houses, etc.
I should add: I am not here to argue about how good Vandersteens are, everyone is entitled to their opinion.

