Some years back when I was running Toyo T1R's on a modded skoda fabia. They were great for the car, I got told by my tunners (Jabba Sport) that the litreture on the Toyo Proxy 4 ( or something like it) were a performance tyre of the same caibre.
I had a quaife fitted at the same time and went out for a test drive. I thought I was driving a barge. Steering input felt like seconds and the car just wallowed.
I contacted Toyo and threatened them under the Sales of goods act, as the tyres were listed on their site as high performance but they were anything but. Anyway, they sent me 4 new T1R's and I told the garage fitting them to keep the proxies (only covered 300 miles).
Coincidentally I wouldn't put them on the Zed. There are two things I dont thing you should be cheap on. Brakes and tyres.