you could always do some rewiring or have it done if you arent comfortable with it. getting up to date wiring on such things is going to be easier now in a new house than it will be in the future once everything is hooked up and in the way. provided you have pull space below or above its simple.
or, its possible to rewire the included speakers to your current room even without messing under the walls. you could use flatwire
http://cdn.soundandvision.com/images/archivesart/GoRetro10.jpg to run along the walls and just paint over it making it nigh invisible. or you can hide it around chair molding. the only part you would see are the terminator ends which normally get covered by an innocuous looking box.
heres an example that was just painted over
http://sewelldirect.com/images/forarticles/GhostWire-Article/21b-ConnectSpeaker.jpg however if you spackle over it and lightly sand before painting its almost completely undetectable.