I have Toyo Proxes all around in my Q4. They are the BEST handling tyres I ever seen. Not as hard as the originbals P700Z but with extraordinary grip levels. Specially on the wet. As a bonus, they are reallly good looking.
I bought the Toyo in Buenos Aires through an importer, but they are really hard to find. There are no officials Toyo shops here. Just Michelin, Yoko, Pirelli or Bridgetone among the most popular ones...
About wheels, I 'adore' the original speedlines of the Q4...the best street looking wheel on the road..