LED indoor/outdoor signs possible with RabbitCore?

I am a test engineer (electrical engineering) and was told on another forum that RabbitCore engines are often used for large size LED signs and displays. I am trying to develop one with single color and RGB modules from China but don’t know which system is best to begin with. I am well versed with Parallax SX chips but will also start learning AVRs and the Arduino. However, if the RabbitCore is the better processor to do this, I am all ears. I also don’t know C that well and would need a BASIC compiler of some sort. Does the Rabbit offer this?

Thanks for you support.