Seppeku

Hi y'all!!! Just wanted to introduce myself and say "Hey"
I've always wanted a Z and I just bought one. I bought a 90 TT. I know I'll love it. Couple questions. Going to put tires on it. Everyone raves about the Kumho's. Are the Supra 712's the best??
Also, looking for a good shop to take it too in the Phoenix area...

Thanks.