Hi Brett,
I did not hear the NFX speakers mated with the SO Imperials at last year's DecFest ..... so I can't comment on how they compared to the Parker Audio speakers .....

However, I
did hear the Imperial / Parker Audio combo and it impressed me enough to have a pair of SO Imperials built for my system.
As to why this pairing worked out so well ..... I have a few guesses that probably have some merit.
The Parker Audio speakers are not a typical "box" speaker. Since they have such a small footprint and are so compact and solid, they keep box resonances to a minimum and disappear into the soundstage very nicely.
The 2 ohm impedance of Parker Audio speakers paralleled with the SO Imperials shows a 1.6 ohm load to the Decware amplifier which makes it as happy as a pig in slop .....

The particular model of speaker that was paired with the SO Imperials was the
Crusader. The very high quality ribbon of this speaker has a wonderfully extended and clean top end ..... which balanced the excellent low end extension of the Imperials.
Of course, the dome tweeter used in the standard 95 and the Fostex tweeter used in the 98 are no slouches either ..... so I would think that any of these speakers would mate well with the SO Imperials ..... ???
Since the 2006 DecFest is right around the corner, it seems likely that Steve will be providing an opportunity to hear the NFXs with the SO Imperials .....
Randy