The flip32 is a great board to start with multirotors and at the same having advanced features.
You can get it in many places, but www.banggood.com will offer you a good price, support, free shipping or fast shipping for a low price and discounts for future purchases.
Flip32:
http://bit.ly/1MDCzSi
Beeper:
http://bit.ly/1KOouAq
Leds:
http://bit.ly/1i2JxIJ
Distance sensor:
http://bit.ly/1NBDHLm