I suspect that your choice is the correct one....
Upon further analysis using this online deflection calculator:
https://www.engineering.com/calculators/beams.htm
Your recommended EMT bends 0.19" at 5 ft with 10 lbs. At home Depot a 10' length costs $18.50. Weight is 11 lbs.
1-1/4" galvanized pipe (0.14" thickness) bends 0.12" at 5 ft with 10 lbs. At home Depot a 10' length costs $38.87. Weight is 22 lbs.
The stiffer pipe isn't justified IMO confirming your choice. Thanks again for your information.