Alan,
My preference would be dependidng upon the rest of your set up. If you have a warm and rather full sounding set up..the Helikon's fast "lean of neutral" sound would compliment the system. The Helikon is not a bright sound..please dont mis-understand. I actually preferred my time with a Argo i more than the Helikon. Both have similar speed and resolution IMO, but the Hel. tends to the slight lean.
In reality, I found that the FSH was a better choice in terms of allowing you to really enjoy the music without any nagging feeling of "something missing"..thus, I would go the ZYX route again myself. The Fuji is not as fast and as resolving in the ever so slightest terms.. Although after hearing my buddy's ZYX Airy 3 directly compared to my Fuji S..I'd take that for a bit more resolution and air. Its as good IMO as the Helikon on its best day.
But, if the choice is solely between the Heli. or Fuji...I'd go the Fuji. Just my pref.