Thank you very much for your answers.
Plt21, Actually I have heard both vantage and summit already. I repeated the experience several times, but in the shops the listening is often done in very small rooms. And of course both sound so great !
The point is it will sound differently in my bigger room, and beside the personal choice, I think there is also a pure non-subjective physical effect. I suppose that you need a bigger woofer in a bigger room to compress the air in an efficient way - I am not so sure about that, but I guess it is true. But I do not know if there is a somewhat as a "decision size". For example : If the room is bigger than X, go summits... Again the problem is that I cannot do the test in my own room for some reasons.
The other thing is I 100% agree that music is a personal choice. BUT I also thing the more you listen to high quality sound, the more yours ears get trained, and the more you feel the difference. So, Even if today I am not able to feel a decisive difference, I may feel it much more in the future. I suppose this is one of the reasons why so much people are doing upgrades.
This is the reason why I ask the question to this community : because there are a lot of "trained ears" here.:musicnote: Having years of experience ahead of me. My ears are not ready yet. I only thing I know is that when we go to enjoy a movie in my friend's HT room (they has a pair of request), and enjoy the marvellous sound, I come home thinking : for sure, this week-end is the last week-end without my own pair of ML's. But which ?
It will cost a lot more to buy Vantage now and upgrade next year - Therefore I try to do the long term choice right now and buy the speakers that I will keep for more than 10 or 15 years.
Of course there is not urge
but I am now thinking about this decision for at least six months...
Joey, I read your adventures, and saw that you upgraded. Have you sometimes regretted your upgrade, thinking that it was not worth it ?