Upgrade mechanical fan vs installing electric fan

Maybe because I live in Phoenix I'm more sensitive to the engine heat that builds up in low speed stop and go traffic. I have a 14 mile commute to work every day, and during that trip, it's not unusual to spend 15 minutes sitting at red lights, or in heavy traffic going under 15 mph. In those situations, I have had much better engine cooling with electric fans.
I had a car with a mechanical fan, thermostatic clutch, and well fitting fan shroud. Sitting at a red light when it's 100 degrees outside with the engine idling, the coolant would reach 205 to 210 degrees. I replaced the mechanical fan and shroud with a pair of 14" electric fans and a different shroud, and now the coolant temp never gets higher than 195, even when it's 110 degrees out, and I have the A/C on.
If you don't have to deal with my sort of high ambient temps, or you don't ever sit idling in traffic at 100+ degrees, I agree a mechanical fan will work great.