Hello.
Some Alloy Bullbars are coming out in heavy walled tube for strenght but they are starting to creep up in weight figures.
Steel is great if you need it, as in outback touring etc.
Some of the larger bullbars are or are going to be illegal in some capital cities.
Not too sure about upgrade of struts, you would be better talking to someone like ARB as i can suggest something but may not be suitable. You have to make your decision first on what bullbar you need.
Smartbars are useless! Why? because they are fitted to vehicles for asthetic purposes like commodores/ falcons. When you hit something substantial ie. Kangaroo, the bar will flex back and do a lot of damage to your panel work etc.
If they counld be mounted to an old FJ/BJ 45 series cruiser it would be fine as the bullbar sits out the front of vehicle by about 500mm.
Hope this helps.
Regards Angus.