Boomy isn't a good thing. The bass will be better textured and more impactful with the ZO, but not boomy. And it without it, it'll have less bass. But really, that's not that much of a problem because bass is something that you can add easily if all you really care about is sheer impact and not quality.
We have tried to tell the OP this numerous times, but to no avail. The OP's only concern is bass quantity, yet still won't listen to our plentiful suggestions.