We had this discussion every other day when I was a member of the 106rallye forum, in the end I got a colleague of mine who was the top chassis engineer at Aston Martin at the time (then went on to be head of wheel design for Rimstock, essentially team dynamics) and is now a design engineer for the company that supply Ferrari wheels (www.apptech.it) to write this as a guide for people.
Bare in mind this was written probably 3 or 4 years ago but the advice is still relevant!...
whilst a good read i think things have moved on a lot and the "gap" on some of the tyres from some makers has closed in on the premium brands.
aston martin wont have the cheaper tyres even on their radar :001_rolleyes:
plenty of tests in magazine where the continentals have won....but these tests were at their testing ground!
is also worth noting that renault have used bridgestone on the megane trophy and gone 9sec quicker.....
what i would also say is the tyres on your motor may give feedback to the driver (thats you) that you actually like when compared to the OE stuff
its still down to the performance/£££ ratio for me