Those speakers you selected are intended to be part of a 5.1 system.
Here is the frequency response from Sound and Vision.
Several things strike me. First of all it has a perfectly dreadful tweeter.
That tweeter is starting to loose it and break up at 5 KHz! By 15 KHz there a a large break up peak. That will be very audible, especially on classical music.
This is a common issue with aluminum tweeters. I don't know why people persist with it. The cheaper soft domes in general have much better behavior. I suspect it is those marketing types again, who I so despise, that insist a speaker must have a shiny tweeter dome.
Next the crossover at 1.5 KHz is a little rocky and could be better. However I really don't like crossovers in that range, as it is right bang on the middle of the speech discrimination band, and one of the most important regions at that for speech discrimination.
The F3 point is 65 Hz, the Philharmonic audio is 48 Hz. That may not sound like much but 65 Hz gets you above the fundamental frequency of a great many instruments. 48 Hz on the other hand gets you close to the majority.
I would say that the Philharmonic Affordable Accuracy Monitor is going to be the much better sounding speaker by far.
Remember for every decent speaker there about 100 lousy ones or more. Polk by the way are well the wrong side of the line.