currently have vista installed, looking to install the mac os but have a few questions, always been a pc users so idk the macos, whats the best version?
also am i able to install the mac os without reformatting?

heres my computer specs;
sony vaio fw290
intel dual core 2 duo 2.4ghz processor
ATI mobility 3650 HD
3gb memory

can i run in, and where would i be able to find drivers and such?