Top recommendation for digital piano?

Yamaha Clavinovas are very good and well established. It is their , I think, 5th generation of Clavinovas already. Arius may be a newer line of digital pianos. Why not visit a Yamaha dealer and ask for more details? If you prefer a more basic digital piano, the YDP series by Yamaha may satisfy you.

I study with a Yamaha Clavinova model CLP-220PE. It is very high quality. The keys are weighted very similarly to that of a real piano - no cheap, thin, plastic keys. The sound is as close to a real piano as a digital piano can get. There is a metronome tool, a record tool, and several voices to choose from, including grand piano and digital piano. You can plug earphones in, if you so choose. It's a very good-looking piano, as well. Shiny and black and very far from being an eyesore, though I suppose you could choose the brown one. (The bench is also very comfortable. Haha.)

I've never owned an Arius, but I think that's more of a digital piano being a digital piano, and the Clavinova is more of a digital piano trying to imitate an actual piano. I'm not an expert on this, though, so I cannot be sure. I can only recommend the Clavinova because I've had good experiences with mine.

Kawai MP-10

Yamaha CP-1