First of all, congrats in your purchase!!, and if you want to know, I own a Tyros2 (before it was a PSR 3000), and also a Korg PA60 (almost the same of the PA50), well, besides performing live, I also work at a retail store in Phoenix AZ, needless to say, I am an Arranger specialist there. We have the Yamaha, Korg and Roland arrangers (I wish we carried Ketron too), well, the Korg PA 50 outsells the PSR 1500 14 to 1....and, for the money, you can not go wrong, the PSR 3000 has another story, but then, another price range.
We sell in the $1,000.00 price range the PA 50 by far, more than the PSR 1500, in the $700.00 price range in arranger 61 keys keyboards, the Roland GW7 is the winner.
Again, congrats, you made an excelent choice.