Go to a stereo shop and listen to the display models, Bring a tape or CD of
the music you like. Play with bass and treble and adjust the sound to your
liking. Play with the volume to see how the speakers sound at high volume -
they should adequately handle the power of the system you are currently
using. [Check the rating]. Check speaker depth front-to-back to be sure they
will fit the holes you have now. Wire em in and enjoy!
cheers!
steve