The sad fact is that just about any ceramic pad will have less braking performance than a non-ceramic performance pad. For a daily driver the difference probably won't be much.
I assume the OP added rear discs for performance purposes (or was it for "looks"). If for performance reasons it would be wise to stick with a non-ceramic pad and bite the bullet on the dusting. There are some performance pads that dust a little less than others. The mentioned Hawk HPS do dust but not terribly so. Mintex AF's don't dust too bad either. One thing you can do is to clean your wheels really well and then add a good coating wax and/or sealer. The wheels will be noticeably easier to keep clean.