"I know that despite all of my precautions motorists will still cut me up and give me problems but I'd rather know that i've done everything possible to avoid the incident."
But this is the thing, when is it actually 'enough'? Do you have reflective tape on your helmet? Do you have spoke lights that can be seen from the side? You can get reflective tyres now as well.... The point being, there's still more you could be doing, so you're still not taking all available and sensible precautions.
I've got good lights front and rear (the front one especially with excellent side cut outs for side visibuility), with back-up lights that blink. Reflectives on my troos, shoes and jacket. Reflectives on my saddlebag. And a reflector on the rear mudguard.
And I'd still argue the case that under streetlights the orange of the backback on the bag is neither here nor there, but the reflectives are, most certainly, a good, practical, visibile, sensible precaution.
(strange, though, that there's never an argument that all cars should be bright orange or yellow so that they're more visible).