I myself love and do robotics! I use the VEX EDR cortex but I hope to use VEX pro. If anyone knows a similar company to VEX Robotics, please let me know! I want to build bigger complex stuff like the BigDog and the PetMan. I've made my own AI! It would be awesome to make a Asimo replica. I also enjoy coding! C++ is life! Here's a video of my coding experiments on the VEX EDR Clawbot!
You could always build your own robotics system. Parallax cores are decent, I believe, and Arduino cores have community support like you would never believe.
I was actually going to use a raspberrypi core but the Parallax core has sooo much :D They even have a robot base kit :P
I wouldn't recommend a RPi, as they're not real-time, and that can sometimes cost you and cause your robot to not operate properly.