Question
My "sales funnel" is wide at the bottom (1000s of companies), and narrow at the top (looking for 1 company). Overall sales cycle is ~2 years. Criteria important to me include - ease of use, reasonably priced (<$100/user/month), good lead management, performance tracking, email campaigns/integration, customizability, and collaboration capabilities
Answer
As per the other comments - Hubspot or Zoho. Insightly is also an option and plugs into Google and Microsoft. Its free for a few users and you can upgrade depending on the modules you need. Pricing starts at $29 per month for basic up to enterprise level. Dashboard is pretty user friendly too.