I use DejaVu Sans Mono as well for terminal and source editing, but I found that it looks more slim if you apply autohinting to it (for example on Debian it changes quite significantly because of it). I usually put this in $HOME/.config/fontconfig/fonts.conf

    <match target="font">
      <test name="family">
       <string>DejaVu Sans Mono</string>
      </test>
      <edit mode="assign" name="autohint">
       <bool>true</bool>
      </edit>
      <edit mode="assign" name="rgba">
       <const>vrgb</const>
      </edit>
    </match>

I used DejaVu Sans Mono until Ubuntu released their Ubuntu Fonts. Ubuntu Mono is a nice programming font! Sorry to tempt you...

The font grass is always greener in the next pasture. :)