If you go with a dual capacity outdoor unit, then you must use a variable speed drive in your indoor unit. The reason, Too much airflow on low capacity. And in the Kansas City area you will not dehumidify on low capacity. Your indoor coil will be too warm.
Lennox has good products.
I thought the new trend with heat pumps was not to turn them off in the winter. Even though they will not heat the house when it is too cold outside, they still will transfer heat to be used with the electric back up. Any thoughts?