Should those more interested in research choose a postdoc or teaching position? For PhD graduates who are more interested in research and little teaching, which is better, a postdoc with a focus on research, or a (non-tenure-track) teaching position (lecturer, instructor, etc.)? I assume that both positions would be helpful when moving to a research position. The point with a postdoc is that even at top schools, the pay is low and they don't guarantee a good job afterward, while a teaching position, with 3-4 courses would be distraction from doing research.
If you want a research position, you should go for the postdoc: a heavy load teaching-centric position will make it hard to publish, which will make getting a research position much harder.