I just bought a Korg PA-80. As far as i know, the only other korg pa, is the pa-60. I feel like i have the greatest keyboard made by korg! I also have a Yam. PSR-2100. Its a good keyboard, but maaan it sounds like it sux by the name! They've come out with Psr-9000 and all i've got it a 2100! I think for every keyboard, the companies should change the letter preceding the numbers, that way, no matter what the numbers are, YOU FEEL LIKE YOU GOT THE BEST ONE!