In your coverage you say
"The P.Audio coaxial line is nice – I’ve heard the 8, 12 and 18-inch versions."
Did you mean 15" instead of 18"? I wasn't aware of an 18" PAudio driver.
I know you liked the 15 inch version, saying that the sound of a large driver can be fundamentally special, but am I right in thinking that now you are leaning more towards the 12" version as sounding even nicer??