I also run Yokahamas on the plus 4, had Continentals on the tin top when I bought it but changed to Yokohamas when they wore out, both winter and summer tyres gave the quietest ride and better fuel comsumption. Plus 4 has plenty of grip when I am allowed to give it a bit of welly (out on my own) so quite happy with them.
found this online supplyer -
http://www.tyres-pneus-online.co.uk/car-tyres-205-55-16-91-V.html prices seem cheap !
Yokohamas seem to be the consensus at the moment
