I suppose that all depends on your budget and expectations.

The technology is coming together to provide all this functionality, but at the moment there is no one-box-solution that would keep an audiophile happy - and I don't think there ever will be. Not even if each top HiFi brand were to develop its own product. The purists would still claim that a dedicated 2ch system is sonically superior. It's likely they'd be right, but then it becomes more a matter of personal taste.

If I were starting to rebuild my system today I'd keep all of my sources but perhaps change the TAG AV32R for a Roksan Caspian AV pre-amp. It's got less bells and whistles but knows how to groove. Ultimately I'd love to find a way to integrate a Sugden A21a for music only. Then I could keep the TAG which is outstanding for movies.

Everything else I'm happy with. I use my PC for video editing as well as managing my music for the portable. The SL300i let's me play my own movies and music files, see digital camera stills. I can stream video from the net and listen to internet radio.  All this is done through a wireless router.