I'm an absolute beginner, but I've been considering both the WK3700 and the DGX350. It seems like the Casio packs in a lot more bang for the buck than the Yamaha, but that it's a bit more advanced. Am I correct in this assumption?

Also, Yamaha's internal software that would help me learn is an attractive selling point...problem is, I can't read sheet music. Would that negate the whole thing?

I'm really left in the dark as to which would be better, or if I'm better off with something else entirely.