well I was in the same boat as all of you fellow 9 5 owners. The tektro brakes stink, the arms flex and it makes for a bad feeling braking experience. Compared to the 6700 on my other bike it is night and day.
I wound up picking up a pair of Rival calipers for a decent price (115) and put those on. Very good, not quite as good as the 6700's but the Rival has a good solid feel to it.
The one thing I don't like about the Sram brakes is they dont have that little centering adjustment that Shimano brakes have. Thats a nice detail.