TR4 Tire Question

It is time to replace the tires on my TR4. the tires on it were put on in
1986, they seem perfectly fine but given they are going on 18 years old they
probably are not all that safe any longer.

So my question. They are Good Year G-Metric 165sr15. on steel rims. What are
people putting on their car for street use. In particular I am looking for
size, manufacture, model and where is the best deal out there. I need to do
this slightly under the spousal radar.

Thanks
Tom