Hi! It's been a long time since I last time visited synthzone and it's great to see a Korg forum here.
I have had a PA-50 for about nine months now. The sounds in it are good. Especially I love Korg strings, they are best i've ever heard. As a sound source PA-50 performs very well. Synth sounds and some of the wind instruments are good. (these are very good, there are much other good sounds in the keyboard too)
As an arranger keyboard I don't like PA-50 that much. The styles sound good but they don't seem to work as well as yamahas when just playing them out. Some fills sound like taken from way other style etc. Also it's much more difficult to smoothly chance chords than it is in the Yamahas. (Or maybe my timing is just bad, but anyway according to my experiences Yamaha is much better
) The Korg PA1X Pro had way better arranger functions, but I only had a chance to quickly test it for about fifteen minutes.
Build quality is not very good. Keybed is not very solid and smooth-actioning like my Roland XP-80, even though it is not the best keybed i've tried. The most i've liked Korg Triton keybed.
For the money the PA-50 offers very good synth sounds (apparently taken from Triton, at least they have the same HI synthesis engine) And at least reasonable acoustic sounds. (There are some very good ones also, but I definately don't like the piano sounds.) In my opinion the arranger functions are not in the same level than sounds. If it only had better keybed I could include it in my gig set, but I hate to be afraid of keys breaking when playing hard, so that's why I try to se ll my PA-50 and buy a real pro-synth, preferably Triton, to replace it even though I lose arranger functions. I haven't tried (
) its sound or style editing functions so I can't say anything about them.
Good luck for searching a new keyboard!