Home Automation - Speaker wiring

Having a builder build me a new house. A contractor wants to charge me $40 per speaker to install rear speaker wires for my home theater. There would be a crawl space under the room, so I could do it myself later. The problem is, I can't decide now where to put the plug panels on the wall because I don't know which orientation would work best for furniture, etc. Now the questions:

1. Should I let the contractor do it?
2. If I do it later, are there code issues I would need to worry about since this is just "low voltage" wiring?

Thanks

hello radin,
whin i install speaker wireing in a home i just normaly install a box and pull in the wire and then install a speaker jack in the box whin we trim out the house. as to orentation mine r normaly vertical close to celling, if the speakers r to hung on wall, or close to the floor if speakers r to sit on floor.

as to is there any thing in the code for speaker wireing no there is not since it is low voltage.
you could do this yourself after the builder is finished but u could also probily do it as the home is being built, just tell the builder u r going to install the speaker wireing yourself, befor the walls r sheetrocked. most builders will allow you to install your own sound wireing. if your builder says no 40 a jack is not to bad of a cost espicely if it includes the material.
if u have any further ? fell free to post or email me

Just to add a couple points. If you are not sure how the room will be oriented, I would run speaker wires to all the possible locations. Probably this is no more than 4 boxes. Run the wires back to some central location and label them well so you can connect up whichever set you need when the time comes. If you can get the builder to let you run your own, then take the opportunity to run speaker wires *everywhere* you think you might ever want speakers. Wire and boxes are cheap at this point compared to going back later and adding it after the walls are closed up.