Hi, To have best traffic for your site used google because bing is only second from google search engine....
in my opinion google is the best way for getting good traffic.bing also giving small traffic and easy to get first rank but you have to concentrate on getting nice rank in google because 90% traffic is covered with only google.
Well there is much discussions about it. But every research shows that 3/4 more traffic gets Google. So consider about using it.
bing is not giving too much but i think bing is in improvement way. bing start sending me more traffic then last year....
I too agree to the point that Bing won't help you bring traffic that you can get from Google as these search engines like Bing, yahoo are divided according to region, but Google is something global that most of the internet user use these days so the amount of traffic Google generates others can't