At $1600 for Golden Spike members, that's a TERRIFIC price for 12 world-class O-Scale passenger cars -- not to mention folks get the ENTIRE train (vs. those of us who've walked this journey for nearly 7 years!!!). That's roughly $130 per car and no hassles of a multi-year wait... or slight paint variations from cars built at different times or by different factories. For CZ enthusiasts not already invested in the earlier cars, this "commemorative set" is a no-brainer with superb price/performance.
That's also a cool D&RGW paint-scheme for the F-3's. I have Atlas-O's prior version on order (from their F-7 production run), but this yellow/black combo is a real eye-catcher too. Hmmm... might need to give Steve at MrMuffins Trains a call for more motive power. 
Decisions... decisions... 
David
