Hah, you're hitting some of my favorites. Markbass amps are a solid choice. You can pick up the discontinued LMII for about $350 or so, or if you need variable line out control, pitch in some more geenbacks for the LMIII.
I went with the II, and it powers my Hartke Hydrive 410 to very loud, crisp levels with a very forward tone. There's just enough tone control that I can contour it to suit different music and locations.
I found a killer deal on a used Hartke cab, but based on my preferences I would have gone for either Markbass, Hartke or Trace Elliot cabinets and been happy.
Official Hartke Club Member #342
Official Markbass Club Member# 466