You might look at the following web page for speaker placement information in a home theater.
http://www.dolby.com/ht/Guide.HomeTheater.0110.html#s3.1
I would suggest using the thickest gauged copper wire your NAD can handle for your center and rear speakers. (A bare wire connection would be fine.) I wouldn't worry if you require different lengths to your different speaker locations. If you have an interest in two channel music (or develop an interest later) consider using a higher quality wire to your L/R fronts. Kimber makes some nice stuff. The 4TC or 8TC could meet your needs. As an owner of B&W speakers I really suggest using copper rather than silver or a mix.
I wouldn't biwire a speaker for movie purposes. The differences are too subtle to be heard in a movie. I hope you have a great time with your new system. Congrats!
http://www.dolby.com/ht/Guide.HomeTheater.0110.html#s3.1
I would suggest using the thickest gauged copper wire your NAD can handle for your center and rear speakers. (A bare wire connection would be fine.) I wouldn't worry if you require different lengths to your different speaker locations. If you have an interest in two channel music (or develop an interest later) consider using a higher quality wire to your L/R fronts. Kimber makes some nice stuff. The 4TC or 8TC could meet your needs. As an owner of B&W speakers I really suggest using copper rather than silver or a mix.
I wouldn't biwire a speaker for movie purposes. The differences are too subtle to be heard in a movie. I hope you have a great time with your new system. Congrats!