The SD would be fine by me, considering how much I've fit into the 512 inside the system, and that that also houses saves and the other channels, even if I could only go up to 2GB that's quintuple the storage space. Oh, and I'll need a way to extend the channels by a few pages, I only have 8 or 9 channel slots left.
And after the Saturn I wan't the Dreamcast. Give me Armada, and maybe a WiiWare version of Armada 2: Star Command, the online-enabled sequel that never materialized.