Don't forget these guys.
http://hopperknockerbullbars.com.au/I can't comment on these specific bars as I have never used them. I don't think you need scrub bars unless you live where you can never get into top gear at night because the roos are so thick. Been there done that! I think the key for you is to keep the weight down as you are not likely to be upgrading front springs in a 2wd to carry the extra weight of a steel bar which we do in a 4wd.
The objective in a roo strike situation is to preserve the radiator so you don't have to walk home. In that regard, taking a roo on the bar is the last of three options and if you have no choice, take him on an upright as it is the strongest part and reduces the risk of him taking out a headlight with his bum. Bullbars have a lot of flex and bounce back into position a lot without bending. A hit on the corner of the bar risks the bar damaging the front panel or an indicator and then springing back.
The first option is to go behind the roo so he is travelling away from you, failing that, option 2 is to go in front of him but this poses a problem because he is going to run into the side of the car. Under this situation, you need to steer back into the roo as soon as you get the nose past him to get the tail of the vehicle moving away from the roo. It is also a good idea not to roll the car in this manoeuvre
Correctly executing option 2, you may still get hit in the rear quarter but often there is no damage as it was a glancing blow. I have driven on in these situations and when i got home, the only damage is a bit of a scuff mark that polishes out. Nothing like dinging a few panels while perfecting the technique!
The worst damage I have ever experienced was when an oncoming vehicle meant I could not take evasive action for a big buck. I got the radiator past him but took him on the front passenger guard and he leaned over, took out the windscreen, got his head caught in the external sun visor which spun him round before letting go, driving him into the passenger door. He then bounced away missing the rear door and took out the rear quarter! Lucky it was a company car
The other bad situation is if they try to jump the headlights. This takes out a windscreen and in one case came though my brother's windscreen, hit the passenger in the head and then ended up (fortunately) dead under the drivers feet!
So in summary, it is best not to test out a bull bar unless you have no other option.