Help with choice of Arduino and PWM output.

[u]Hello, I am designing cuadrocoptero communication with Arduino and GSM Shield. What is arduino better ?, not clear that arduino is better, since I need to control 4 DC motor speed, and maintain constant communication.[/u] [u]I hope you can guide me in my project. please! and thx[/u]

I don't think you can use a cell phone signal to control a quadcopter because the delay might be too much. Not sure but that would be my first thought.