Reviews on Amazon and AVS forum. Seriously. The magazines died out because they pandered to advertisers and/or ---That which is odiferous and causeth plants to grow---.
I listen to the Home Theater Geeks podcast occasionally, but not religiously.
On the music side, the low quality of the source nowadays makes it no longer worthwhile to have a super high end audio system for music.
I stream from Rhapsody and Pandora. I've purchased a couple CDs in the past few years expecting them to sound better than the mp3 files; they did not because of the way they were mixed. If you have an old collection you enjoy, I suppose it's still worthwhile.