How do I get the proper microsymbol, μ not mu, not \textmu because that looks ugly, but the clean one?

Question

How do I get a clean looking \micro symbol µ ?

I want a micro symbol, not a greek \mu, because that is another symbol. However tex does not render the proper symbol, and the symbol that is does render looks like it was stolen from a different font.
The 2nd variant is not much better.

How do I get a \micro symbol that actually looks like it was not copy-pasted from comic-sans?

% !TEX encoding = UTF-8 Unicode
\documentclass{standalone}
\usepackage{tikz}
\usepackage{amsmath}
\usepackage[euler]{textgreek}
%\usepackage{textcomp}
\usepackage[active,tightpage,psfixbb]{preview}
\PreviewEnvironment{pgfpicture}

\setlength\PreviewBorder{0pt}
\begin{document}
\begin{tikzpicture}[x=1pt,y=1pt]
  \begin{scope}
  \path[clip] (  0.00,  0.00) rectangle (433.62,252.94);
  \definecolor{drawColor}{RGB}{0,0,0}

  \node[text=drawColor,anchor=base,inner sep=0pt, outer sep=0pt, scale=  1] at (242.01, 10.00) 
{Time in μ $\text{\textmu{}} \text{seconds}$, $n = 125\,000$};
% the unicode char "μ" does not render. And it has better not look like #2 above >-:< 
  \end{scope}
\end{tikzpicture}
\end{document}

Answer 1

As you don't like the micro symbol from siunitx, I try something else:

Use unicode-math with XeLaTeX or LuaLaTeX

\documentclass[margin=3mm]{standalone}
\usepackage{unicode-math}
\begin{document}
10 $\symup{\mu}$s
\end{document}

Edit:

As @Mico stated in the comments, you should combine unicode-math with siunitx by defining a new command – it is more natural IMHO:

\documentclass{article} 
\usepackage{unicode-math,siunitx} 
\newcommand\upmicro{\symup{\mu}} 
\begin{document} 
\SI{10}{\upmicro\second}
\end{document}

Answer 2

I found this rather drastic solution given in the answer by user11232 in this StackExchange post quite satisfying (on GNU/Linux i.e. Fedora using pdflatex). I noticed that the mu character looked different there from that on my system when using siunitx package (without using the libertine package). The solution is drastic because it changes the font for the whole document but the libertine fonts are beautiful. In summary the solution comes down to using a combination of the siunitx and the libertine package. Example screenshots with and without libertine package are included below

\usepackage{libertine}
\usepackage{siunitx}

Examples

without libertine:

with libertine: