Definitely 3.5mm remains king of the hill for connection to an external audio source.
That having been said, don't overlook the opportunity to use Bluetooth, particularly if you have a good audio panel. I recently upgraded my PS Engineering audio panel from a non-Bluetooth panel to one that supports Bluetooth. The integration with my cell phone is seamless.
The real advantage to using either a hard-wired audio input jack or Bluetooth to an audio panel is that you get to take advantage of the various muting modes provided by the audio panel.