It's a long time since I paddled a Millenium, but...
There are still some examples being paddled here in Cape Town. I had a chat a Millenium owner a few days ago in Dawid Mocke's shop - he was looking for a new boat. He said that just found the M too tippy and he was looking to try an Elite or even a Swordfish.
As stable as a Synergy? Phew, not the Milleniums that I used to know! They've definitely got a reputation for tippiness, and certainly I found it very tippy back in the day.
My paddling partner Dale Lippstreu bought a carbon Millenium when I had my Custom Kayaks Icon - the Icon was a very tippy boat too, but Dale's carbon M was unplayable and he sold it within a couple of months.
In my opinion, the Elite is far and away a better boat - especially downwind. The M is fast on the flat and on small bumps, but loses it in the bigger stuff, where the Elite dominates. But hey, as I say, there are still guys performing on the old M, so it can't be all bad.
Rob
Currently Epic V10 Elite, Epic V10 Double.
Previously: Swordfish S, Evo II, Carbonology Zest, Fenn Swordfish, Epic V10, Fenn Elite, Red7 Surf70 Pro, Epic V10 Sport, Genius Blu, Kayak Centre Zeplin, Fenn Mako6, Custom Kayaks ICON, Brian's Kayaks Molokai, Brian's Kayaks Wedge and several others...