Nice to see real numbers!
Did you take the measurements with a microphone or did you take the resonance measurement with a multi meter or ...
And of course, how did you do this? (I'm all for cheap methods!

)
I agree with what you say: "get one good driver."
Fact is, I have these 4 drivers
still laying in the garage.
That's all there is to it, no need to make a choice, I can only build it like that:
housewrecker with RadioShack's

The ports and volume are still something I want to learn more about, so I can change the sound a bit.
So thanks for all the explaining!
B.