I think that Muppity is totally on the mark about children needing down-time. We won't have an x-box etc in the house because we want to force the boys to find their own fun. I'm a bit of a meany with the DVDs too. They have to have a few TV free days every week.
DSS rarely watches TV with us as we are always doing something, he watches ben10 sat mornings then the TV is off and we are usually renovating the house or busy catching up with people, he has grown to love this time (didnt to start with) so will either now help or play outside. Some weekends, we will sit down Sunday night and he will say "wow, we havent watched TV since Ben10." i asked if he missed it and he said that he didnt even think of it until now!

He also was not a kid that was into play fighting or anything like that, but the taekwando has helped him be more of a little boy and enjoy these things.

As for the equipment, it comes with the lessons as they are earnt. ie he cant get leg guards yet as he isnt up to that stage, when he is, they are supplied as part of the fees.

At dinner time, why dont you take turns asking a question of each other? after the question has been answered its the next persons turn to speak. Its great that he is so articulate, but also needs to learn that other peoples POV is also important...

HTH