Well that is brand new, I will keep an eye out for a TD9K2 / KX2. I am sure I can get a decent deal. My problem is I am to impulsive, thats where you come in and slap me.
It makes sense to buy the better kit first time, I might just start putting money away for the KX2, that would be my ultimate. Or there is always a acoustic kit
Whilst the TD4 would be an upgrade I see what you mean though, won't take long before it is also not enough. What I like about the TD9KX2 is it seems to have a massive amount of customization, like tone levels etc.