Calling from and to ZoHo CRM

Calling from and to ZoHo CRM

I have a question about calling from ZoHo CRM as a European Zoho customer (Netherlands). 

What is the best phone provider for me to use and why? The phone systems I see on the Zoho list seems to be made for customers best based in the US.  I'm also a smal business and don't have a reception. 

At this moment I’m using Skype. 

Thank you for the assistance!

Martin