i donot know much about Santa Fe.But with alittle search in the database i found this shot for GP40 and written in the remarks that its the only Santa Fe's GP40.
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mohamed
bnsf-born 2 fight
big boy 4-8-8-4 ''best of the west''
(if you like an idea,thought alot in it and worked hard for it.you will get it) click here 2 c my pix @ rp.net
I suppose your choice on what engine to buy all depends on what years you would like to model with your railroad. The D&RGW unit is from the 1970's up to around 2004, whereas the Union Pacific engine would fit in during the late 60s all the way to the 1980s.
Of course, you could always model the year 2006, buy the D&RGW unit, and have a huge group of miniature rail fans waiting trackside for it!