No personal experience but Avon has been around for years.... I believe
they were standard equipment on Aston Martins for many years. They were
English tires; not sure which conglomerate owns them now.... ;-)

But speaking of tires, I just had to replace one of my Michelin MXM4's
- I ran over a piece of metal in the road and took out a chunk of tire
and borked my alloy wheel.... Man, these things ain't cheap! $249
installed at the cheapest place I could find! Tire Rack had 'em for
$199 but were out of stock - but after shipping and install, probably
would have been about the same. Fortunately, Audi provides a full-size
spare and matching alloy wheel, which is very nice indeed.

Dan D
'04 A4 1.8Tq MT-6
Central NJ USA