Hello and welcome to the forum 
For this question, you are the best judge.
Everybody has a different work flow and there is no one size fit all solution.
I suggest you to download either Core or Lite version and create a live USB to test run yourself.
Pro version is not really a merchandise. It is essentially the same as free versions. Pro comes with 4 additional desktop layouts and pre-installed applications. All applications can be easily installed in Software in Core/Lite version.
It is offered for those who wish to support developers (there are only 2 people in the team) in lieu of making a donation.
You might be interested to see this ongoing Poll: