Red Kev and Whaler - I agree with you both. Usman looks like he is made of the right stuff. Slats did a comparison between his technique and Hughes' when defending a similar ball on the the TV the other day. It said a lot. Usi looks rock solid. I would just like to see him play his free flowing strokes a bit more. It will come.
Whaler - some strong arguments for Usi and I agree with most of what you say. I think he needs more chances. My argument is that he will not survive unless the performances come sooner rather than later. It's just the reality. Oh and by the way if two seasons of Shield form was good enough Usman and a third of a season good enough for Warner - why do you discount Cowan's current form and refer only to a career average which spans nearly ten years. Cowan has been scoring runs consistently in state cricket for at least two seasons and that is the best evidence he is ready.
Red Kev, Offshore and Jameswm - and all others calling for Cowan to be picked. Please see this article http://www.theroar.com.au/2010/11/13/the-answer-to-australia%e2%80%99s-middle-order-woes-is-a-man-you-may-not-have-heard-of/
I wrote over 12 months ago advocating for him. There is some personal background in there you might find interesting. At the time we had a spot in the middle order but now that it's an opening spot and he is scoring loads of runs - the argument is even stronger.