The Budapest is an interesting opening over the board...although you won't often see it at the highest levels. Black dictates the opening in ways that are rare for queen pawn openings, and the shock value can be downright fun. The problem is that the Budapest is more boring than the early knight foray would seem to suggest, and for the same reasons that the Budapest isn't seen much at the GM level, it's not particularly fit for CC either. This is true at least if Black is interested in more than barely hanging on for the draw. I think the below is White's best try for a straightforward advantage and all the winning chances. Of course White has to be prepared for other variations, especially at Black's 4th.