I have WS-50s on the Van, but there's only been one snow night over the summit so far. But they did a pretty damn good job of sticking to the 1/2" sheet of ice the plows left on the road. I only felt the electronic center "diff" in the van do it's thing twice in about a 9 mile stretch of road, on each trip. The van weighs about 4500 pounds or so, and I was on 205/75R14s at about 36 psi. Hard to measure dry grip and braking in the van however. All I can say is that I've never slid a tire in spite of reasonably strong attempts to, not counting a few intentional brake lock-ups. No front ABS.
I picked these because TireRack's survey had them rated the highest among ice and snow tires in ice grip, and that's the most important thing to me too going over the summit.
I really liked the M2s last year myself. My one snow donkey run-in aside, they kept my n00b winter driving ass on the road the rest of the season, including a few trips over the summit with snow on the road. The M3s are supposed to be a significant leap forward with the newer compound though, so I wouldn't lump them in with old technology just yet.
Getting back to your research Dean, I was led to believe by what I read that the Revo 1 isn't much superior to the WS-50 on ice, but it should kick its ass in dry conditions. For a car, I'd be considering between the Revo, WS-50, and M3, with M3 probably being the first choice. However, I think only the WS50 is available in the 14" Miata size, so I'll be making it a second set of those probably.