I'm another Veto Pro Pac user. For smaller jobs which require a multitude of different tools they are really good (loads of pockets, durable and the shoulder strap is comfortable). Far, far better than the Stanley or DW - but you will pay a high price for one. I also have a Stanley backpack, but it really only gets used as auxilliary transport because it isn't big enough for many power tools, and in any case joiners tools are heavy, meaning there are limits to what you want to carry on your back
For power tools I have a selection of Systainers, Makpacs and similar compatible clip together boxes (many of which came with my tools) from Hikoki, Mafell, Metabo, etc which get moved around on a folding sack truck as required. I also have a couple of T-Loc totes.
If you aren't already on Systainers or compatibles I can see the DW or Milwaukee system boxes maybe being a better bet as they are slightly larger and made from a less brittle plastic, so possibly more durable on site.
Forget the LXT400/600 and lookee-likee padded bags (all the power tool makers offer them) - they can't carry heavy loads (and they do tend to get overloaded), the stitching is dreadful (meaning that the zips pull off prematurely) and the wheels are not up to the task. Been there, done that, far too many times