I'd say bluetooth is good enough for using the device(s) as a phone - but a jack might be better for connecting a high-end stereo system. On the other hand, even for that, you would probably be even better off with a digital output, and a good DAC (either in the amplifier, or as a separate unit).

FWIW I recently got one of these:

http://us.creative.com/p/sound-blaster/sound-blaster-e3

and I'm very happy (not for use with an Apple device though, I use it with a Sony Xpedia Z3+, my laptop and my desktop via a recent generation usb bluetooth dongle (for AptX support).