Is this engine DCC ready? 

BACHMANN Spectrum Diesel F40PH Eng Ph.II AMTRAK  Item #87003.

What decoder would it use if it is, one of Bachmann's ?

I am trying to decide which Amtrak engine to get between a Bachmann Spectrum, an Athearn P-40, or a Kato F40PH.  Needs to be DCC equipped or ready.  I bought a set of Con-Cor Amtrak cars for cheap and really want a strong and smooth engine to pull them.

I am running a 18" curve oval inside a 22" oval and connected them with a #6 left crossover. I want to add a #6 right crossover but I am not sure if I need  1/3 or 1/2 sections to widen the 18" oval. I really don't want to buy the wrong track size.