Negotiating selling commission on a $1.2M sale

[Terese Victor]

I've sold 6 properties in Denver metro (all under $500K sales price) and the highest commission I've paid to my selling realtor has been 2.5% (+2.5 or 2.8% to the buyer's realtor). I am now prepping to sell a home for $1.1M to $1.2M, so I am planning to offer my selling realtor a max of 2%, and the buyer's realtor the same. Does this seem reasonable?
I also pay for performance, meaning if my selling realtor gets my full net-price or better, I bonus them an extra .2% (which would be $2,400 in this example).