Hp pavilion dv6 3105 sl

[Petenausen]

Hi
I have got this laptotp. It has the following configuration
·
· Processor intel i7-720QM 1,6 GHz, 6 MB di cache L3 Chipset Intel HM55 
· hard-disk: 500 gb
· RAM 4Gb
Video card ATI Mobility Radeon HD 5650, 1gb ddr3

Which version of mac os could I install?
I am really a newbie I have tried to have a look at guides but a lot of things are difficult to be understood for me.
Bye from Italy