Different Electrodes

This blog is adding to my last post. A couple weeks ago I was having trouble with my T-welds and finally I got it figured out. My electrode angle was completely wrong and I was moving way to fast. So I got my welds looking great and all the sudden my instructor changed electrodes on me. This made my welds look bad again because the new electrodes were a cheaper brand and made poorly. What are some cheep electrodes that work well?