Schnittpunkt im Diagramm und "runde" Kurve

\documentclass{article}
\usepackage{pgfplots,tikz}
\usetikzlibrary{intersections}
\pgfplotsset{
  width=1\textwidth,
  height=0.7\textwidth,
  every axis legend/.append style={at={(0.1,0.7)},anchor=south west,   % Position der Legende in diesem Fall untere linke Ecke bei x=0% und y=100%
    cells={anchor=west}},            % Position der Beschriftung innerhalt der Legende (east, center, west)
  title style={at={(0.5,1.05)}}            % Position der Überschrift                  
}

% Extract coordinates, taken from the answer of precusse
% http://tex.stackexchange.com/questions/88386/
\makeatletter
\def\markxof#1{
\pgf@process{#1}
\pgfmathparse{\pgf@x/\pgfplotsunitxlength +\pgfplots@data@scale@trafo@SHIFT@x)/10^\pgfplots@data@scale@trafo@EXPONENT@x}
}
\def\markyof#1{
\pgf@process{#1}
\pgfmathparse{\pgf@y/\pgfplotsunitylength +\pgfplots@data@scale@trafo@SHIFT@y)/10^\pgfplots@data@scale@trafo@EXPONENT@y}
}
\makeatother

\tikzset{dot/.style={draw,fill,circle,inner sep=1.5pt}}

\begin{document}  
\begin{tikzpicture}
  \begin{axis}[
    xlabel = Menge\,/\,Tsd. Tonnen,
    xmin = 0, xmax = 1,
    ylabel = Kosten\,/\,Mio. Euro,
    ymin = 0, ymax = 7,
    title=\textbf{Break Even Point},
    ]
    \addplot+[smooth] coordinates {
      (0 ,0)
      (0.250 ,1.179361)
      (0.500 ,1.218722)
      (0.750 ,1.258084)
      (1.000 ,1.297445)
    };
    \addplot+[smooth,name path=A] coordinates {
      (0,3.000000)
      (0.250,4.179361)
      (0.500,4.218722)
      (0.750,4.258084)
      (1.000,4.297445)
    };
    \addplot+[smooth,name path=B] coordinates {
      (0 ,0)
      (0.250 ,1.625041)
      (0.500 ,3.250082)
      (0.750 ,4.875123)
      (1.000 ,6.500165)
    };
    \legend{
      Wert1,
      Wert2,
      Wert3}
    \path[name intersections={of=A and B,name=i}] (i-1) \pgfextra{
      \markxof{i-1}\xdef\xcoor{\pgfmathresult}
      \markyof{i-1}\xdef\ycoor{\pgfmathresult}
    };
    \draw[dashed] (axis cs:0,\ycoor) coordinate (ycoor)
    -- (i-1)
    -- (axis cs:\xcoor,0) coordinate (xcoor);
    \node[dot,pin={above left:Break Even Point}] at (i-1) {};
  \end{axis}
  \node[below right,rotate=90] at (xcoor) {\pgfmathprintnumber[fixed,precision=5]\xcoor};
  \node[above right] at (ycoor) {\pgfmathprintnumber[fixed,precision=5]\ycoor};
\end{tikzpicture}
\end{document}