Is there a keyboard out there that allows you to record songs... even with drum beats in the background, regular piano, flute, cello, violin, etc. and still sound authentic? I only have about $1000 to spend, but I am willing to go over to get something with all my requirements-- I was looking at some $1800 keyboards the other day. I'm an aspiring songwriter and hoping just to create "background" tracks for songs I wish to sing. Otherwise is there a better program I can buy for the computer? Please tell me your opinions and advice.