Confirming that Keap is the best value for my needs

Before I make an investment into a CRM in which I need to be able to see the exact links i.e. precise source websites from which my leads are originating before visiting my site, I want to confirm the following:

1. That for small business, Keap, formerly Infusionsoft, has the best system for 10K contacts and 3-5 users for under $450/month and no set up fee on the market – that hubspot is good too but costs like $4K to set up and around 800-1K/month to do what Keap can for what we need and not much more –

2. That Salesforce, Marketto and Eloqua are way above our budget for what we need right now as stated above i.e. needing to see the exact precise websites from which my leads are originating before visiting my site.

3. That FreshSales, Active Campaign, Mail Chimp and AirTable could work but would include more integration and API work with Zapier and not necessarily be as good as Keap because Keap is more seamlessly integrated as well as established in its support from having had the ability to provide the exact source website origination link of a lead before visiting your site and then upgraded with graphly and its upgrades to go from Infusionsoft to Keap.

Thank you.