Which osx version to get ?

[Ride2kmax]

Hi

I new to this forum. I have read many many pages and can't decide what version of Osx86 to try so that i can have a better result.
I need a version where are I dont have to use a mac as i dont have access to one.
So if anyone can advice me as to which one would work best with my system configuration i would greatly appreciated.

System:
Q9950
G33m-DS2R Bios f9a.
8gb RAM
HD4890
2 hhd
1tb hitachi with window 7 64bit
320gb wd planing on using it for Osx.

I have downloaded iATKOS v7 10.5.7 and iDeneb v1.6 10.5.8 Lite Edition but before i even try them i wanted to know if maybe there was a better version that would be less painful.

Thanks everyone in advance.