Just to add to what has been said already, a Sample Accurate Clock (this is where the DAW sends out an audio pulse at 24 PPQN) will be more solid than the computer sending MIDI Clock. So if you had any trouble with stability, keep that in mind.
As far as integration, a Sample Accurate Clock like CLOCKstep:MULTI can respond itself to MIDI control and program changes, so you can integrate it tightly using automated commands, including things like controlling the external Start/Stop and even quantizing MIDI Commands so that they happen precisely on the bar’s downbeat.
And since you mentioned having an Audio Click track, CLOCKstep:MULTI has its own click track audio output that you can set up for each song (and automate it via MIDI Commands like the rest of the features if you want).
I think it’s worth checking out, but then I make the thing, so of course I’m going to say that. 
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