So looks like I might get another couple of clients to work for doing web development. Which is good and has made me think about what I might do for CRM-related purposes.
After doing some searches and seeing various Mac-based options and then web-based options like HighRise I decided they were either not complicated enough, too-complicated or too expensive for my needs like HighRise.
In the end I have decided to use what I already have, alongside upgrading one thing. Basically I have a mac.com account so I know I can keep all of my contacts secure across multiple devices and the cloud, but I also have Evernote where I can acces all sorts of info again across multiple platforms.
So I have upgraded to Evernote premium and am starting to use that for my CRM, making better use of tags and also using the email address that allows me to send stuff for storing on Evernote.
Think it should all work for me, and help to keep my customers happy!