Here is my set up.
The second stem drops the bag low enough that the top flap clears the aeros.
Even when I didn't have aeros, I didn't like how high the bag rode with the quick click mounting system, though I do like the system itself. The second stem/accessory bar clears up the handlebars for attaching other stuff (like the aeros).
I also had some cheaper aeros on my converted mtb with butterfly bars. It was comfortable to have a resting position on long days.
