I think reading this review would help you quite a bit with deciding between the G-17 Air & the Zeppelin Air: ENGADGET
"Compared to less expensive AirPlay speakers like iHome's $300 iW1, the $550 G-17 Air is an unquestionably a major step up, and we'd easily choose this puppy over options like the slightly spendier $600 Zeppelin Air."
Among units similar to the G-17 Air, we believe we come out in top in terms of bass.
Movie playback isn't the #1 purpose for the G-17 Air; however, several of us have used it during lunchtime to watch Mad Men and enjoy the sound.