Richard
I run 165/80 on both the 6 and my 4, Michelin XAS and Vredestein Ttrac respectively. I ran the 6 for many years on 185/65 Uniroyals before switching to the XAS and would agree with Mick above, the car is just sweeter to drive. The 4 is a rally car so needs all the ground clearance it can get hence running 80 profile and the abuse the tyres get mean I go for more of a budget option where I can get a whole car set for the price of an XAS!
It's worth having a good look at what tyres are available for a 6 in 165/80, there are plenty of different makes covering a range of prices b