The ship date for the UMC-200 isn't being pushed back, it's just displaying when the next stock is being sent out to customers.
For example, customers who purchased before January 10th, but after December 24th, would have their UMC-200 shipped to them on the January 10th shipment.
So you can purchase the UMC-200 now, but it wont be ship out to you until around January 30th.
If you're interested in buying the UMC-200 (and the XPA-5), I'd recommend that you go ahead and purchase it now while the Emotiva holiday sale is still going on.
Also, I have the UMC-200/XPA-5 combo (speakers are the B&W 683s and htm61) and I highly recommend it. The combo has been a huge step up from the A/V Reciever I was using (Onkyo TX-NR808.)
I haven't used the outlaw 975 though, so I wouldn't be able to compare the two.