I am planning to make a Wi-Fi controlled robot with 4 motors (for driving) and 6 servos. The robot will also be have around 4 sensors. Simultaneously, the robot will be streaming live video to a computer and displaying the sensor outputs.
Can a single Raspberry Pi Model B handle all of this?
I also have a problem choosing the right motor controller for this project. Would the Gertboard suffice?
Can a single Raspberry Pi Model B handle all of this?
Yes. It makes it easier if you know how to program in a lower level language such as C.
To make the stress levels a bit easier to manage for the Raspberry Pi, I would make sure the camera you use is the one specifically made for the Raspberry Pi (it's design is optimal for robotics).
I also have a problem choosing the right motor controller for this project. Would the Gertboard suffice?
It depends on how much your motors and servos will draw from the board. But yes, it should suffice.
A possible alternative would be the GertDuino.
motionfor the cameras, and issuing command-line commands for movement (using Python scripts). I am using an old Cybot base, complete with motors plus motor controller, which you can get off eBay easy, and a brilliant (but cheap) battery bought from Maplin - see here. – Wilf Nov 26 '13 at 23:08