Suggestions for Locomotives?

[Amalynn]

The correct answer in every single instance is the cheapest unit to operate that will handle the existing traffic on the existing line, to include grades.

In many cases, a switcher is more than adequate.

That makes perfect sense. To be honest the main reason I am looking at Geeps is because I like them and they were my first "big kid" models after my first train set, and I know I can generate the traffic and a good enough story to warrant them.