Stop using steel, go to aluminum.
Here is another vote for Pro-Tapers. My first bike came with them. I've had a few get offs that caused the clamps to mis-aline, but the bars were fine. My new bike received the Pro-Taper SE for cost reasons. I didn't want to pay to mate the 1 1/8 bars to my stock clamps.
The SE's have a bit more flex than the Pro-Tapers's, but that is to be expected.
Changing the stock steel bars to aluminum would one of the first, if not the first upgrade to a new bike.
Good luck, Steve.