I've had them all.
Horses for courses.
If weights an issue go alloy, but don't expect too much strength.
If alloys not strong enough for you, go steel.
If you're a poser with far too much time and money and no idea then strap a 5 post farm gate to the front.
(of course cattle stations etc which need them exempted)
I am having a smart bar fitted tomorrow.
I've had them before and had plenty of knocks, roos, and winches on them.
My preference as its light and strong. If a hit is hard enough to bend a smartbar back and wreck the car, then a steel one at the same impact would be cactus....
I had 2 x steel bars replaced in accos on my last patrol. Neither of them big hits. One in a carpark where the boss went too far and kissed a pole, and another 45 degree impact at the front from a P-plater who thought it was better to take photos while driving than watch where they were going. Both required panel and metal work and lights bonnet etc replaced. Both times bar was replaced.
I realise a smartbar is not the all round answer, but its safety aspects and ability to "absorb" some impact, fares well in my books.
Again, horses for courses