Toyo cut their account months ago because they were selling them too cheaply. I was quoted £80 for Toyos & 85 for SO3's + VAT (trade price), so there is not lot of difference price wise. Anyhow, Japanese stuff has historically undercut brands from other countries. Look at the unbelievable price of a Civic Type R when it came out?
They do seem fairly sophisticated tyres having trawled around the web a bit, so we will wait and see!
The Elise BB that I also post on (SELOC) seem to rate Toyos above SO3's but below some of the more track orientated Yoko's. Of course, Saabs are around twice as heavy, so I expect that tyres wil react differently.
Should be interesting to see how they perform, though! I expect with the 17" wheels, a hell of a lot better than my current setup!!