After buying my first 3.2 Omega in 2004, I used Dunlops, Goodyears, Hankooks and Michelins on it (I was doing highish mileages at that time). I can't remember what it had on it when I got it, but the Michelins I had fitted were by far the best tyre for me.
My Audi had Pirelli P Zero Rossos from new (which were true 'ditchfinders'), before reverting to Michelins. The Michelins are far superior in handling, wear, feel, and road noise. The only other make which I felt happy with was Continental, but I wouldn't particularly choose them over Michelins.
ATS have periodic deals with Michelin tyres which I try to make use of; the last set of 17" I bought saved me over £120 fitted on the cost for a set of 4 compared with all other suppliers, which makes them a good buy.
Everyone has their own perceptions about tyres. Some just need them to be round, black and as cheap as possible, whilst others can actually 'feel' and 'hear' the benefit in fitting better quality tyres.
I hope this isn't becoming a tyre debate now we've exhausted oil, air, pollen filters.....