2009 to present - Building a WP locomotive roster

In the summer of 1970 I was lucky enough to visit the Feather River Canyon for the first time and see some silver and orange GE diesels of the Western Pacific Railroad. Because of that memory I have always liked the WP but had not really collected any WP engines except for a pair of Atlas GP7's.  Building this new layout of the paired WP / SP line in Nevada gives me the the opportunity to model another railroad that I liked.

So starting in about 2009 I began to find the occasional deal on WP engines on ebay.  All of these were Atlas models as WP had only 4 axle road diesels and all of Atlas's offerings are 4 axle while Kato's are mostly 6 axle, wonder why that is ?

So here's what I have so far:

I'm really proud of the fact that I've got decoders in all of my WP locomotives.  The ones with Lenz decoders came with those but all the others I installed.  While it's always tempting to buy more locomotives, this should be a good fleet for this layout and I believe is a good representation of what they had running by the time of the merger with Union Pacific.  One locomotive model I would like to add is the U30B as WP had 19 of these.