Tirerack.com is a good place to start looking to determine which manufacturer has what sizes available. Plug in your desired tire size, and start looking. 15" tires are getting harder to find.
I went with Firestone Firehawk Indy 500's. The Goodyear Eagle II's get unfavorable reviews, slippery and bumpy. BF Goodrich, not sure.
I looked at
www.tirerack.com to get some perspective, but ended up working with a local Firestone dealer who searched through her database and found some the right size, and had them shipped down to their store for installation.
DD