Rather than starting the search for systems by looking at products and 'killer' features.

Start by documenting the current pain points:

• Write up a mind map or brainstorm all the current pain points in the organisation (these could exist in either electronic, spreadsheet or pen and paper systems)
• Circle and write the top three affecting breakdown in sales processes
• Circle and write two ways to improve customer interactions

Ok, now ready to look at solutions. There are 1000s of choices for CRMs.
Start by limiting the search on:
- Need for a strong sales pipeline
- Need for project management
- Need for specific integrations. e.g. Office 365, Google, Xero, Evernote, Dropbox

Here are two examples of great CRMs:

Capsule CRM

• Free for 2 users and 250 contacts
• Simple and easy to implement, and would suits businesses with a sales and customer service of team of 1-10 people
• Lots of good integrations, including Xero integration (to view invoice history and overdues against customer interaction details).

For more info see capsule's website.

Insightly

• Free for 2 users and up to 2500 records
• Also simple and easy to implement. Suits businesses with a sales and customer service of team of 1-25.
• Flawless interaction with gmail and recently released Xero integration (create draft invoices, view invoice history and see overdues).

For more info see Insightly's website.