Fullboat2,
Think of it this way...it is an extra type rating that you will have...because the guys that get the 400 now will never (??) get to go to the Classic in their Atlas careers. The Classic's tenure at Atlas is not very long, but I've been saying that for 10 years!!
That said, the Classic is still a good airplane and does make lots of money for the company...don't let 400 pukes like me tell you any different. I was on the Classic for a long time, and it is now a niche airplane for us.
None of our airline ACMI customers want it, but it is the best airplane for the USAF.
Enjoy it, and congratulations.