Hi -- I'm a songwriter and I'm hoping I can buy a keyboard with piano-like weighted key action and at least one very good piano sound. As well as that, I'd like the keyboard to be able to record (by way of a "sequencer"?) what I have played and give me the option of being able to "drop in" to fix any parts I need to fix. Apart from that, I don't really need any further features. If there is a keyboard that would suite my purpose please?