You will swear that you are actually playing the piano. Alicia's Keys is a little over a hundred bucks (and takes up 7gb) but it is simply stunning. However, if you don't give some of the Kontakt libraries a fair shot, you are missing out. They are very powerful and fully integrated into Live. For making your OWN samples and beats up and stuff, definitely stick to sampler / simpler / drum racks.
