Dinny, of the more casual ones, I think I like the booq's better than the Tom Bihn. Either would work for business for me but I don't wear a tie or jacket at the office. If I recall correctly you are in a more conservative office so they may be too casual. I like my Tumi, which was a gift from my wife. She didn't get the leather because my partner told me the reason he no longer carries his is it is too heavy. I also didn't want to spend $600 plus on the bag.
Once I return from my vacation, assuming I have any money left, I will order the Tom Bihn iPad case to compare with the booq.