I have compared Spendor S3/5s to Green Mountain audio europas and found the spendors sounded veiled, lacked transparency, and did not convey a sense of space like the europas. The S3/5 sounded nice, but the europas sounded real.
The europas are very uncoloured sounding, and they do the soundstage thing like no other speaker I've heard (including much better than Spica Angelus and Martin Logans).
They're factory direct only now, but Green Mountain has a new Callisto speaker out soon, that should be available through dealers.
I have never heard any of the other speakers on your list, but the europas strike me as a bit of a bargain.
The europas are very uncoloured sounding, and they do the soundstage thing like no other speaker I've heard (including much better than Spica Angelus and Martin Logans).
They're factory direct only now, but Green Mountain has a new Callisto speaker out soon, that should be available through dealers.
I have never heard any of the other speakers on your list, but the europas strike me as a bit of a bargain.