Hello Mark,

The PA-3X will be properly presented at Frankfurt, early April.
After which there will be a fair amount of proper demos I would guess. The first ones to arrive in the shops at least here in Europe are expected in June. I think it safe to assume they will be more widely available by August/ September.
The chances of it going the same way as the Audya are about zilch imho.

regards,
John Smies