So you know my background: I went 'no-poo' a year and a half ago. Now, I use DC no-poo maybe once a week (and I'm talking a very tiny amount - just to get a couple of spots that feel oily.) In between I am WO. It works great for me too. (I condition my length regularly.)
When I begin to notice build-up on my scalp, I will do a BS/ACV wash. It helps a lot and doesn't set you back with WO. You might consider that instead of a shampoo/conditioner thing, plus it's cheaper.