you could get a voltage meter for much less...
anyway, I'd go for B, although a cap anywhere would essentially be the same thing. Electricity is supposed to go where there is least resistance, and so therefore the caps, in theory, should be as close to the amps as possible. Wonder if caps can contribute to noise, like power cables do on signal cables.
Sony C90, 210 EQ
Seas 27TDF/C, RE XXX 6.5, custom xo (dyn 240GT sitting idle)
RF 60.2 amp
Soundstream picasso 1400.1D
Bass drive-by's are uncool.