If you're looking for longevity and reasonable performance you can't go wrong with a set of Bridgestone RFT's or, if you're looking to splurge, a set of Michelin Automotive Tires. Look for a higher AA rating when tire shopping, as small convertibles benefit more from that sort of performance.
The tires that came stock on the 1959 Impala were the OEM. On the convertible they were the 235 blue-flame tires. OEM stands for the original equipment manufacturer.
In my opinion, Michelin, Bridgestone and Yokohama are the best tires on the market. Toyo and Goodyear are also decent tires, but my personal favorite all purpose tire would be Michelin. It all depends on what kind of vehicle the tires are for.
Tires for the best value can differ. It depends on where you go to purchase them, what size, and what kind you get. Searching for tires and pricing them is as easy as finding a telephone book, or even get numbers or referrals from local mechanics.
Nokian Hakkapeliitta 5 studded snow tires are best snow tires for a 2004 Volvo XC70. But they are expensive, and check your local laws before you buy them. Studded snow tires are illegal in some areas.
When you are looking for 20 tires, l would recommend the comparison sites like ebay and amazon. Many tires companie have accounts there, and customer feedback is useful in helping you to decide where you can get the best deal on 20 tires.
The best way to purchase tires for a good price is online. This will require that you know the kind of tire that you require.
Your best bet is to go to your nearest auto dealer shop. They can better asses what kind of tires you need whereas you cannot do that online. They are trained professionals. Online you can get an idea for what tires are worth.
A good place to find info on any kind of tires is Pepboys. They have any type of tires and their cheap.I would also recommend Walmart but Pepboys is best.
Convertible pesos
Corvair
That's entirely a matter of opinion and according to the kind of use people expect of their car.
There are several different things that you need to think about. What type of driving are you going to do? What kind of vehicle do you have? All weather tires are a good standard tire. Performance tires are good for sports cars. All terrain tires are better for trucks.