I'm currently still using a Mac Pro 1,1 as my main machine, and as a Plex media server. My new retina iMac arrives this Friday, and I'm wondering if it is ok to leave the iMac on with the display asleep so that I can have access to my Plex movie collection? Should there be any concern about heat, or length of time the machine is on? I hardly ever turn off my MacPro and it was always run without issue...