That pa should sound epic unless you have a guitarist ripping a marshall stack full blast instead of going through foh, thats some tasty PA you have, the 745s would do most gigs I've ever played never mind the subs, for anyone not familiar with those tops they are not like a Mackie thump, the voice coils can pump out enough top end leaving the 15" to handle mainly the bass and kick drum alone, like having a 15" bass cab fed with a 1400 watt head on both sides of the stage , add in them subs and Wow!
What desk are you using?