I am the owner of a newer version of Phast 'Est that uses a Fountek ribbon tweeter, and two different 7" woofers -- Scan-Speak and Seas Excel. I hardly get to listen to it these days because of circumstances, but I really like it. Good balance across the spectrum, with very good low frequency extension (-3 dB/47 Hz, -10 dB/32 Hz) in a reasonable package . My ears tend to prefer the "BBC dip" kind of speakers, but distortion is low enough in these that a flat response in upper midrange does not have me running from the room on bad recordings.
I also got Rick to put in three different tweeter levels for me: flat, flat-0.5 dB, and flat+1.0 dB.
I use flat-0.5 dB for my listening.
--amit