Best SEO Software?

What I am looking for is a program that would show current rankings, etc for a domain so that you could compare before and after results or to provide a client with a report showing current serps. What would be the best software to use for this?

Thanks

The same people who made SEO Spyglasses has a program that both tracks your rankings and gives you I guess "reports" on your rankings.

http://www.link-assistant.com/

I.b.p.