I have a laptop with the following specs :

Processor :
AMD Athlon X2 Dual-Core Processor QL-64
Cache Memory L2
Chipset type AMD RS780MN Chipset
Cache size 1 MB

RAM : 1Gb - 1 x 1024 MB DDR2

Storage :
Optical Storage SATA DVD+/-RW SuperMulti DL LightScribe Drive
Hard Drive size 138 GB @ 5400 rpm

Video : Graphics Processor / Vendor ATI Radeo HD 3200 (Integrated Graphics)

I'd like to turn my laptop into a hackintosh to see what that looks like, but which OS would you suggest?

I mean I have a macbook pro running Mountain Lion but I'm guessing installing this on my laptop would be even impossible.

Which OS would you suggest so that I can have a nice, fluid mac experience on my hackintosh (but nothing older than Leopard as that would make the experience too depressing :-D )?