MacPro and FCP Studio

Hey guys,

What would be the minimum OS that can be installed on the MacPro being sold at Apple's website today? I have Final Cut Studio (latest version 7) that I purchased a few years ago and it ran fine on Leopard. I also have Snow Leopard but FCS ran a tad slower on my old MBP that I had it installed in.

I am not insterested in using FCPX.

Thanks for any help.

mokeiko