I gave you the recommendations for (by far) the best Windows software - they just happen to also be the best recommendations for any platform you put together yourself given your requirements of remote usage , menu system and integrated guide. There's nothing from ATI that comes with any kind of guide that's usable from a remote control. For Mac OS there's simply nothing with any kind of Guide that works with a remote from anyone - only web-based guide from TitanTV. For Linux you have MythTV and Freevo - if you want to spend more time sccrewing around with configuration than actually using the setup, good luck with one of those two.

Bruno