I am switching over from Canon (5DMarkIII) to Sony (A7R III). One of my main reasons for doing so is to lessen the weight of the rig I must hold for 10 hours straight for most of the weddings I cover...ouch! Is the HVL-F45RM flash powerful enough inside a large dimly church or reception hall, or should I bite the bullet and go with the higher price tag and heavier weight of the HVL-F60RM? Obviously, in the end, nothing is worth skimping on having enough light!