Hey Haggi,
I understand you want to avoid double gamma correction and seemingly it comes to your preference what the default settings will be, they can be changed anyway.
Generally speaking, I won't post something before I test and as shown in the images attached, gamma setting (when chosen through the render settings) affects quality of the image, sometimes less sometimes more depending on the lighting.
V-ray has a setting for that as well, called "adaptation only" which allows the renderer to proceed with all its calculations as though color mapping is applied without applying color mapping so that the noise levels can be corrected accordingly.
In the images attached the one rendered with a gamma of 2.2 has less noise and was done in less time even though all the other settings were identical.
The image named "Gamma 1.0 to 2.2" is identical to the first one which was rendered with a gamma value of 1.0 and then corrected to 2.2 in post.
Difference might be small but is surely there.
Regards,
Ian