I'm looking at buying a new 27" iMac after they are released. However I would like to install Snow Leopard as the OS (don't like the bloat and iPhone-ification of ML, and I have some older apps). Will this be possible? I assume the install disks from my current 24" iMac won't work, but can I download a current version of OS 10.6.8? If this won't work with the new iMacs, do you know if the refurb 2011 iMacs ship with Snow Leopard or Lion pre-installed?