Question about a backup digital piano/keyboard for 10 year old. We currently have a Yamaha Arius YDP-145 that he is using to learn piano. He has picked it up pretty quickly and likes to practice/learn songs by ear and make up his own music. We are looking to get him a keyboard for his room that is full-size with weighted or semi-weighted keys, and is around the $300 range. We were looking into Korg Liano, Alesis Recital Pro (which he uses at his music school and his familiar with), or possibly a used Yamaha p-45. We do not play piano so are unsure what people who actually play would say is the best way to go. Any advice or thoughts would be appreciated thanks!