Copy and paste these into the url bar and start you're research:
google.com
ask.com
bing.com
Yahoo.com
Try out the Google vs Yahoo thing. type a phrase on google.com, such as "Llamas are", and look at the first suggestion that pops up. Then go to yahoo.com and type the exact same phrase "Llamas are" and compare the first suggestion that pops up on Yahoo! with Google. Best suggestion wins!