In my experience, based on amps of this level, one should do proper research, rather then get a bunch of opinions thrown at them from every direction, mine included.When comparing amps, statements like "X amp blows Y amp out of the water" are not particularly helpful. It only has meaning if we have a sense of what you are looking for in an amp. If what you like differs significantly from what I like the statement may be meaningless but if we look for the same thing in an amp it may be more informative.
In my experience regarding amps on this level, none get blown out of the water, it's just a matter of what you like personally. If everybody was looking for the same thing out of an amp there would only be one amp design with very slight variations on the theme, but clearly people have different tastes.
Saying what you like and don't like specifically about an amp is much more helpful than statements like "blows it out of the water". Who the hell even knows what that means anyway?
I like amps that tend to be "in your face". IMO the Ecstasy does not have that quality. I liked the amp when I had it, dialed it in to what I liked, but in the end, it was too much low-mids based and too far-away sounding.
The SLO is the opposite of that and so is the PT100.....IMO
Depends what you wanna hear. I was just offered up a friend's new 101b. He decided his Mesa MK-V suited his needs better and put the Bogner for sale.
All these amps are excellent, it just depends on your application.
Sorry for the short "blow it out of the water" description.
As to YT vids, some are recorded very good. I can usually get a read on an amps tonality using YT as a research tool.
Good luck on whatever amp, they all rock-