Excellent itinerary. West of Socorro, N.M. the Very Large Array radio telescope is worth a stop. You can't miss it with the huge antennas right next US-60. The amount of science that went into creating this is unbelievable.
Riding US-191 (the Devil's Highway) northbound in my opinion is a much more enjoyable experience than riding it southbound. The town of Clifton is a great place to poke around for a little while. Chase Creek street, the main street of Clifton is like stepping back in time a hundred years. the old jail across from the railroad station is also very neat. The Morenci Mine is unbelievable. You can see one of the maintenance facilities right next to the road and the mine trucks are huge. They have a capacity of 230 tons. It is hard to imagine how much ore is carried out of the mine when it is 460,000 lbs a truck load. There is also a viewing area where you can look into the pit. It is amazing.
US-180 from Alpine, Az to Silver City N.M. is another good ride but watch for tar snakes. NM-152 is also fun road
And lastly the Buckhorn Tavern in San Antonio N.M. is a place I will ride out of my way to visit. You are right the green chili cheeseburgers are the best.
It should be a great trip, you seem to have put a lot of though into it and have chosen some very great roads. Have a ball