F40PH, C30-7, and SD60(M), just a few that I would love to see.
I would really love some SD60's and M's. It fits with what they said post-ES44/ACe that they were going to focus on the larger (6-axle) locos that perform better, but then of course I think they've done nothing but 4-axles since that proclamation. (or small 6-axle in the case of the RSD-4/5) But if I could have some Oakway Leasing SD60s and BN SD60Ms that would be really really cool. I would grab some UP Ms too for sure. Rio Grande fans and some others would benefit too.
Still sits behind the C44-9W on my most wanted list, but definitely a 100% buy for me.