We are looking for new keyword tools. Right now we are using a variety of tools some proprietary and some commercially available. I am trying to find out what company's like Digitas use for their keywords lists on enterprise clients. Some of these campaigns have 50,000 - 250,000. In your opinion, what's the best keyword tool currently available? Does it data mine? Does it do misspelling? Competition targeting? SEO vs SEM? We have a $2,500 budget. Thanks guys!