Suggestions for Locomotives?

[Amalynn]

If anything, I think you made it harder, nutbar lol

I believe you have a good start with your GP30 and GP40..I would be tempted to add another GP30 for the stone train..
Here's the truth. :o <!-- m --><a class="postlink" href="https://www.youtube.com/watch?v=UnEprIUC0TQ">https://www.youtube.com/watch?v=UnEprIUC0TQ</a><!-- m --> a brace of GP30s still looks great.

As far as your SW1500 I would give her a good cleaning and remove the metal contact strip and solder wire for the pick up from the trucks.

I don't actually at present have most anything that's been listed here. I unfortunately sold a large number of my models when I got out of the hobby years ago, so I will be getting new models. I do think that a pair of GPs on their own would probably cover like 90% of my motive power needs, since the quarry would be switched by locos from the NS.