I'm learning to play and was wondering which would be a better fit. I understand the two I have listed are a little different - one with 61 keys, the other with 76 keys. I think I like the sound better on the NP-V60 and was wondering if the price difference is worth it. Also, do they both have the accompanying beats/songs where you can play along with the music? Any suggestions - pros and cons of each - would be greatly appreciated.