I've got the 17inch wheels and I want to keep them, but when it comes time to buy new tires, should I get the Potenzas again or get something new?

If so, what's a good alternative for the 17's?

 

well... if you are keeping the 17" wheels, the only alternative is a 17" tire.


Good replacements are:
Bridgestone SO-3
Yokohama AVS ES100
Michelin Pilot Sport
Kumho Ecsta MX
Kumho Ecsta 712
Dunlop SP 9000
Pirelli P-Zero
Sumitomo HTRZII

it really depends how much you want to spend on tires.


Hope that helps.

PeteH