It seems like you are misunderstanding my point (the two posters above me). I'm not saying you must complete RTK to do grammar or start with Tae Kim (that claim would be ridiculous), all I'm saying is that if you already decided to do RTK as part of your studies, it would benefit you more to do it as early as possible. Tae kim will definitely be easier to do if you have already completed RTK, so if you plan to do RTK anyway, it makes sense to complete that before you start with Tae Kim.
