MuchAMAZE

Hi,
i am thinking about buying a keyboard for my piano practices and to just make some music in my spare time. I dont really make music much but having to be able to make short musics would be nice.I am considering the Launchkey from Novation and i am worried that it might not sound as good as those yamaha or roland keyboards out there in which it was made specifically for piano. Do they sound the same ? Its because that the launchkey needs the sound samples on the computer u=in which it might not sound as good and refined as yamaha sound samples in which they are taken from real pianos.