Hey Neil,
I get your point too about trying to save costs, apart from in the other thread about the control tyres and the 'expected' number of sets to be used...
To have to expect to go thru' 3 sets of any tyre to be deemed 'competative' is anything but cost conscious!!! In that case I see no difference in going thru' 3 sets of a specific control tyre, or 3 sets of my preferred tyre... There is no cost difference...