first project: Acceleration-based / Wireless / MP3 player setup.

Hey guys. I'm new to arduino, (and fairly new to electronics), and want to start my first project, but am over-whelmed by all the things available to purchase.

Here is what I am looking to do:

I want to make a light-saber that wirelessly sends signals to speakers that will play a different tune (saber-sound) depending on how quickly the saber is moving.

What I THINK I need:

In the saber: - A small Arduino. (smallest possible size would be ideal... perhaps the Arduino Pro Mini 328?): (http://www.amazon.com/Arduino-Pro-Mini-328-16MHz/dp/B004G53J5I/ref=sr_1_1?ie=UTF8&qid=1380402624&sr=8-1&keywords=mini+arduino) - an Xbee: (http://www.amazon.com/XBee-1mW-Wire-Antenna-802-15-4/dp/B004G4ZHK4/ref=sr_1_1?ie=UTF8&qid=1380402383&sr=8-1&keywords=arduino+xbee) - an Accelerometer module: (http://www.amazon.com/Arduino-GY-521-MPU-6050-gyroscope-accelerometer/dp/B008BOPN40/ref=sr_1_1?ie=UTF8&qid=1380402543&sr=8-1&keywords=arduino+accelerometer) - some sort of EL wire or LED tape: (http://www.amazon.com/Neon-Glowing-Strobing-Electroluminescent-Wire/dp/B003J9BCOW/ref=sr_1_4?ie=UTF8&qid=1380402854&sr=8-4&keywords=led+wire)

in the speaker-box: - Arduino Uno R3 (http://www.amazon.com/Arduino-UNO-board-DIP-ATmega328P/dp/B006H06TVG/ref=pd_sim_sg_1) - MP3 player shield: (http://www.amazon.com/MP3-Player-Shield/dp/B006TGID7Q/ref=sr_1_1?ie=UTF8&qid=1380402170&sr=8-1&keywords=arduino+mp3) - Wireless SD shield: (http://www.amazon.com/Arduino-Wireless-SD-Shield/dp/B006RATC2E/ref=sr_1_5?ie=UTF8&qid=1380402383&sr=8-5&keywords=arduino+xbee) *do people stack shields? i imagine it would be possible so long as they don't have conflicting pin connections... - Xbee: (http://www.amazon.com/XBee-1mW-Wire-Antenna-802-15-4/dp/B004G4ZHK4/ref=sr_1_1?ie=UTF8&qid=1380402383&sr=8-1&keywords=arduino+xbee) - Then a 12V car battery and some automotive 6x9" speakers.

My question to you guys: - What do you think about my list?

I'd like to buy everything I need in one go, and I'd rather not be buying stuff that I can't use for this project. So any advice about purchasing the necessary components for this project would be greatly appreciated. Thanks!

Just noticed: This may be better placed in the "Project Guidance" section. It seems I am un-able to delete my own post. Sorry about that. I'll wait for a Mod to move it if need be.

Thanks.