Business Email List and Mass Emailing

I am looking at starting my email campaign. With my services being geared towards US & Canada small businesses, I need someone to compile a list of small business email addresses. These need to be valid email addresses, and not some SPAM filled email list that has been hit repeatedly. I am looking for something like this: [login to view URL] I just do not want to spend nearly $500 for that list, and then more on mailing them. If someone can get a list similar to what datadepot has, and ALSO offer to send emails using their OWN servers that would be great. It is important that you be able to handle this from your own servers. So I am looking to attain an emailing list of roughly 5 million email addresses such as what datadepot has, and also looking for someone to send out the emails! I would like the list in EXCEL format, so that I can organize by state if need be. Actual mailing addresses would be great if those were available as well. Would like to work with someone that has done this before as this would most likely be an ongoing thing. If you have a list already, please give me details on where the list came from.