I haven't personally owned any speakers above the price of $300 but $699 does seem way overpriced regardless of how powerful the
speakers might be. I've only ever used the Jawbone Jambox and the Bose Soundlink before and I would definitely recommend getting the Bose over the Jambox since their prices are similar at $250 or so. Because of how light the Jambox is, it vibrates quite a bit when it's played at higher volumes. In fact, it could even vibrate itself off the table unless you stack something heavy on top of it, which is kinda annoying if you have to do this every time you want to use it at different places.