There's no harm in waiting for a bit more. What's bad is regretting the features that you wish you had because you didnt wait for a better deal. If you really want to go with that deal that's better than model 4, then by all means go ahead.
Its getting nearer guys!! The supercharger will finally arrive, I am positively sure that there will be a long line when it arrives. Make sure you have your spots well taken care of.