Hi Caiman inks
I am on my 4th set of tyres (Q7 4.2TDI S LINE), 1st set replaced F.O.C. after only 6k miles 2nd & 3rd set lasted around 9k. First three sets were the same brand that where fitted when I purchased car, latest set is a budget alternative. The wear is better although the handling is different and also a little more road noise.
Adjusting the suspension setting as suggested by a8 Tech helps.
As far as pricing is concerned, our local Audi dealer (Cardiff Audi) were as competitive as anyone else if not more so.
Hope this helps