Better Motherboard or Better Processor first?

Hi!

Limited budget. Usage is a computer which will be used for my experiments.. hardware and software.. Gaming (racing/strategy.. no fps), occasional movie conversions..
Hackintosh  

Planning to do some development on it, but we'll see..

Considering these processors: Intel Pentium G860 or Core i5-2400
Motherboards: Gigabyte GA H61-D2-B3 or a z68 motherboard..

Problem: Like I said, Limited budget. So I can build component by component. I have a HD4770, and I'm ok with it for now. Do I get a good motherboard and then upgarde the processor or do I go in for a decent motherboard and go in for the Core i5?

I also don't think i'll need more than 8 GB or RAM, do you guys see any need for more RAM?

Thanks
Septagon