So you are planning to build even more sophisticated robots? The CrazyPi board can help. It comes with SLAM, remote audio/video streaming, and Raspberry Pi support. The board has a quad-core processor, 1 GB RAM, and 16GB onboard ROM. It comes with Ubuntu installed.
Robots you make with this are ROS programmable. The advanced kit comes with chassis, 4K LIDAR, camera, and everything you need to get started.