The best File Manager to your template

Hi, Buddy.
I want to use a kind of File Manager extention into my Hot Software template, in order to organize and manage some file downloads, form registered users.

I'll offer some PDF files, ZIP files with samples, and a ZIP with a user program as a demo tryal.

What 3rd part do you suggest as best? I was studing RSFiles, JDowload, and Akeeba Release System, and DocMan.

If you have any other suggestion, please feel free to give me.

I only tried DocMan and I can say it works fine. However, it's not free anymore. I did not try other extensions.