# Large braces over several items in an itemize with text by the brace

This question is related to this question: Adding large brace next to body text, but is not a duplicate.

I have an itemize in a beamer presentation. I want to put a brace over some of these items. So here's what I have so far:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{decorations.pathreplacing,calc}
\newcommand{\tikzmark}[1]{\tikz[overlay,remember picture] \node (#1) {};}
\begin{document}
\begin{frame}
\frametitle{Here is text}
\begin{itemize}[<+->]
\item A first item \tikzmark{topbrace}
\item Another item, also inside the brace \tikzmark{bottombrace}\tikzmark{right}
\item Outside the brace
\end{itemize}
\onslide<+->{
\begin{tikzpicture}[overlay, remember picture]
\draw [decoration={brace,amplitude=0.5em},decorate,ultra thick,black]
($(right)!(topbrace.north)!($(right)-(0,1)$)$) --  ($(right)!(bottombrace.south)!($(right)-(0,1)$)$);
\end{tikzpicture}
}
\end{frame}
\end{document}


(needs compiling twice to get the right result). Incidentally, why is this? Is it something to do with the remember picture thing?

I have two issues with this excellent solution: the spacing doesn't look right (I'd like the top of the brace to be higher), and I'd like to add text to the right of the brace (see picture).

I can't quite fathom the complicated positioning commands used to add an extra node with text, or modify the spacing...