What are some awesome running shoes that are very comfortable?

I want shoes that won’t give me blisters. I love to run, play basketball and racquetball. What is a good shoe that can handle all that? I’d like to keep it under $100 if possible but any suggestions would be great.

Can I use my racquetball shoes for tennis, or should I buy some actual tennis shoes?

Where are some of the best places on the internet to buy Racquetball equipment?

Please don’t say ebay. I’m always looking on ebay. I’m wondering if any players out there have found some good racquetball sites on the web that sell racquets at a good price. Thanks!