ive never had avons TBH but a mate of mine had them on his Nova (was a 2.0l mind) and they were fine... BUT the ones he had were VERY soft and wore out very quick..
I should warm you this can be an issue with the proxies too as they are a fairly soft compound tyre..
Although it will be the same with any tyre that will grip... ie if it grips it wears out quicker!