Community - I've actually been watching a few episodes lately, and think it's kind of funny(which surprises me, it normally wouldn't be my type of show).
Yes!. The R30 Concert DVD is great. It may be one of my favorites of all the DVD's that came out the past 10 years or so. The Snakes and Arrows Tour is excellent as well.
Feedback is the only studio album by Rush I don't own. I'll probably get it eventually to satisfy the completist in me. But I'm generally not all that interested in a band doing cover songs. A few hear and there is Ok. But an album's worth is not something I'd see myself listening to that often.