mediaserver

Hey Guys, Curious which OS I should focus on running on a MacPro 1,1 in 2016? I know, it's old. But I just can't let this machine die. It's a MacPro 1,1 (2006) I pushed to 2,1 and did the 8core processor upgrade. It's currently running 32gigs of RAM, 5770 gfx & and booting on an SSD to Snow...