I use edgeracing.com. They have decent prices and shipping. I put Toyo T1-Rs on my Z06 for ~$800. That includes shipping, mounting, new stems, and balancing.
I ran Kumho MX the last time. I really liked them, but since I'm supercharged now I can easily overpower the tires. When my car was stock plus a 100 shot they worked great. So I would say they are an excellent choice for the money for a car making 425rwhp or less. I got mine shipped and installed for right at $750.