If Atlas , Athearn, etc., ever add these to their HO scale product lines, I'll take a pair of T-6's in the black NW livery, one in PC black, and a pair of LIRR SW-1001s in their very sharp as-delivered blue & white.
I'd take a T-6 just for the cool factor, but would be much more interested in an S-6. SW-1001, sure, who can't use a late model EMD switcher. Then there is the SW-1002 and SW-1003C....