The point wasn't about comparing 15" 2-way speakers. It was a client who initially wanted to buy ZXA5's, then asked last minute to hear them with the KW153's. Possibly better speakers at a lower price point is appealing, no?
The others were extras we had laying around.
A tangent- I think driver size and number of drivers is becoming last century. For example, when used with subs like all systems should be, a KW153 should smoke a Nexo PS10 r2. If you closed your eyes, could you tell? What if both had not only subs but full processing? Why does it matter to hear top speakers unprocessed and without subs, if that is not how they will be used in real life? I want to remove variables like EQ, and listen for issues that can't be fixed after the fact.
I am also a fan of total system cost. An inexpensive speaker that needs special processing and multiple amps should include those in the cost. Example- SM-60F vs PS10.
/tangent
Caleb