I currently have a 2x2, 3x3, 3x3x5, 4x4, and pyraminx. I am looking into getting bigger cubes like 5x5, 6x6, 7x7 etc. I was thinking about yuxin 5x5 or shengshou 7x7. My question is what is your favorite big cubes event and what would cubes you recommend to someone getting into larger cubes?