Employer match is always put into a Traditional 401(k), in case that matters to your thinking.
Since this is the most generous 401(k) plan I've heard about, I want to confirm that you mean contributing the 2018 401(k) limit of $18,500 will result in a $9,250 employer match? Make sure you get all of that +50% match, even if you have to resort to Traditional 401(k) contributions.
$250 tip: make your Traditional 401(k) contributions $1,550/month, rather than $1500/month. You'll get $9,250 of matching instead of just $9,000.