I know this discussion is a bit old, but I have been using both a Genesis 1000 gasser and a 22-1/2 kettle for years. Weekdays after work it is often the gasser....pork chops, burger, pork tenderloin. Light the burners, go inside, prep the potatoes, get the stove going and then go back tune in the dials and finish the cook. Nothing fancy, but a real efficient way to put dinner on the table and still have that Q flavor.
Weekends however, when it is time for a load of chicken, ribs, roasts, now we are talking kettle (and just recently WSM) and a love affair with the process of low and slow. That is my 2 cents. They work hand in hand