I have heard good things about this 13.5 motor
http://www.hobbyking.com/hobbyking/s...%5Fsensor.html
This is a good esc
http://www.hobbyking.com/hobbyking/s...1%5F12%5F.html It seems its out of stock at the moment but they do have higher amp ones in stock.
This would be a good budget system.