Mojo Storage Requirements

[stealth]

We're in the process of upgrading our HD2 systems currently on G5's using Aurora Igniter cards for video capture and playback. We currently use an internal SATA drive for video capture and playback and glyph firewire drives for audio playback. We've been using this setup or the past 4-5 years with no problems at all.
We're going to move to the Mojo SDi for capture and playback and probably will shift platforms from Mac TDM to PC TDM so we can use things like Interplay, Video Satellite in the future. After looking through the compatibility docs I'm a little confused about storage. It seems like Digi is really pushing SCSI but we've been without it for a while without a problem and I'd hate to go back unless we absolutely have to.
So for those of you using similar systems is an internal SATA drive for video plus audio on firewire gonna work for us with the Mojo? We do mostly promos and short programming with relatively small track counts.
Also anyone have any input on the MAC vs PC TDM?
Thanks
Jamie