Your real best bet is Sonos in my opinion. I am not one to ignore the original request of someone but after you specifying that it was for pandora or iPod I think Sonos is an excellent choice.
Receivers with 8+ amps are expensive, and well Sonos can be as well.
What's your budget? I ask because you said "inexpensive". Are you looking for this to be controlled centrally?
AVR: Marantz 7008 Phono: Pro-Ject Debut III Speakers: BW CMC2 + 2xCM9 (front) + 2xCM5 (rear)
TV: Panasonic 65ZT60, Samsung 60F5300