what is the best super speaker and why?

Not to poke at a hornet's nest, but I couldn't ever answer that question without knowing the room size and accoustic environment and the type of music being listened to. You can ask preferences under certain conditions but to ask for the best (absolute) requires criteria since there is no best under all conditions. Even at $100K a speaker designer makes tradeoffs which might or might not be to your liking.
Maybe I'm just a grump because I have not listened to any of the speakers mentioned.

Just listened to the Avantgarde's 2 and 3 speaker systems and was left with a very unimpressed fealing. They lacked clarity but the biggest problem with them is their size, not physical, but accoustical. In a normal to large room they have no sound stage at all. I'd call it deep throat. Most of us like a piano live from about 15-20 feet. If you think the best sound field is with your head inside the piano the Avantgarde's are for you.

Next I auditioned the Revel Ultimat Studios. They are the most compelling detailed smooth sound I have ever heard. And that's being driven with a 150 w/c NAIM amp. I can hardly wait to hear them with my Krell's. I've not heard their big brother the Salons but you really don't have to spend $30K and up for the best.