Unfortunately, no Consumer Reports for pistols. Quality is a lot perception. Think of a quality car - Mercedes Benz comes to mind. However, according to Consumer Reports, it is the worst.
Mercedes always over engineered their vehicles, developing a reputation as the very best. Then Chrysler bought Mercedes Benz and imposed it's culture of corner cutting & penny pinching upon them.
As for the best handgun, a very subjective topic, my vote would go to the BHP,
Service record : just about every country except Russia has fielded it.
Reliability: excellent even in desert conditions, the hajis love it too.
Eurgonomics: excellent, arguably one of the hardest elements of design, to make it just "feel right" & "point naturally".
Esthetics: come on just look at it.
Quality: F.N. has never skimped on the BHP.
Accuracy: Possibly not the most accurate service pistol out there, accurate enough for its mission though.
I have to admit, I lament the current trends in modern pistol design, most offerings look like the result of feeding a dog some black LEGO bricks and waiting for nature to take its course.