Here's an update:
https://img364.imageshack.us/img364/8717/temply0.th.png
I still don't see anything better then Maya Software render on a noticeable level...

I increased the number samples for anti-aliasing, added contrast threshold and increased the filter size (what are the last two settings anyway? I copied them from the Maya Software high quality render settings)
I also fixed the HDRI since the last render was done without it (I moved the file and forgot to update it...).
Here's a weird thing: Render time after these changes went down from 50 min to 38

Anyway, a render question this time ( It's a new territory for me so excuse if I'm asking to much of those) :
Is there a way to set up your computer in a way that only the most basic programs will run for render purposes (no internet connection/anti-virus/servers/anything else that I don't need)?

C&C please,
Benny