In my mind, the PRSL baldwins were so classic. I still have some Golden gate PRSL P70's in stock. They are real P70's...not some heavyweight car painted PRSL. Everything imaginable has been done in PRR, Reading and CNJ. There have been a few shortlines in southern NJ. but they are rather recent (by RR time lines) and dont know how much of a following they have.
Right now im having MTH do SW-1500's in TRRA and IHB for me (idk how they ever missed doing these 2 huge midwest terminal RR's) , and they are doing RS-1's in Morristown and Erie, and Black River and Western..two long established NJ shortlines...for me also..
Ive asked MTH about doing some smaller diesels in 2 rail...but no go so far. It would be some new tooling and design, and i dont think they want to go there.
Waiting for Atlas to do some smaller diesels in 2 rail might be a while, and for some reason, they are not as receptive to doing special runs. IDK why, but some ppl have gone to MTH for special runs after being pushed away by atlas. Atlas will be able to do the MTH engines they bought tooling for pretty quickly. ...which means the possibility of 2 rail GP-38's and GP-40's, but nothing smaller than that.
I really like doing shortline, regional, and terminal railroads. AS-616's there's Trona, Sierra, and some logging RR's in the PNW, like OC&E, etc.
SD-9's...hardly any shortline usage that I can think of.
If anyone wants to pitch ideas to me..have at it... The possibilities right now in engines are...AS=616, SD-9's, GP-7/9's. These are all railking scale. So far..i jumpped on the SW1500's and the RS-1's cause they are later tooling and more detailed than the other's, which are earlier tooling. The MP15 and MP15AC's are possibilities, but Im not a big fan of either.
Please remember if suggesting...I need to get pre-orders for about 20 pieces to make it all viable. So dont suggest anything that u just want 1 of, and dont know if anyone else would be interested.