Well, if you want a quickie review, i'll be glad to, with the Extremis vs. Peerless CSX
Extremis is much more airy sounding. Very nice response. Tight, accurate, and hits the lows better than any woofer i've heard til this date. Midrange frequencies are AWESOME. As i said, very airy.
Peerless CSX has a slightly more solid response. Not quite as airy, but still holds its own. Not as much low end as the extremis, but still definitely a contender amongst higher end speakers of "name brands" (as you already know). Smooth midrange response, but kinda bright. I had to smooth a lot of it out with my EQ. With the right tuning, sounds almost as good as the extremis.
Extremis = better
Peerless CSX = not as better
Poly 6.5 Ascendant audio = Not sure yet? I have my eye on that Le of .05mH and smooth response curve. 11.5mm xmax
Damn impatient monkey!