matth76:
You started this thread on the basis you had a scary moment on your present tyres and that I see is still your main concern. While it is always nice to have a cool looking tread pattern we also know that does not mean it is the best tyre for a RWD pumping out 276bhp+ as there is ample evidence on this forum to that effect. Definitely bin the O40's - having experienced those way back they were far too hard a compound/side wall and whilst great for drifting, on the road, particuarly in wet/slippery conditions, are bad news.
The tyres that keep coming across as the most suitable for the ZED are the Michelin Pilot Sports (probably the best but also the dearest) followed, and in no particular order, by the T1R Toyos, 452 Falkens, Vredestein Sessantas and 050A Stones. I'm not saying they are the only ones but that's what shows up having followed opinions on here over the last 5 years or so and in my book you need to use you head rather than your heart in terms of tyre choice. Of the options I have noted the Toyos probably come closest to satisfying the looks 'department' - hopefully they are available again as there has been a supply issue for ZED rears in 2009.
And while I am on my soapbox, please, please use the same tyres on all 4 wheels and don't wait to you get down to the legal minimum in tread depth. Different tyre brands and types made by the same manufacturer are all constructed differently and the ZED is a beautifully balanced an poised car in standard form (that is what has made it one of the best drivers' cars) - to then mix tyres between front and back is unlikley to improve on the handling or grip - it is more likley to worsen it and will 'bite' at the wrong time, in the same way as worn tyres will.