I played PA80 for about 3 weeks. Currently, I own Yamaha PSR2000. Tyros is much better than PSR2000 from what I heard.

I would pick Yamaha anyday. I got frustrated with the PA80 and its un-intuitive user interface. There is no comparison if playing experience is what you are after. Of course, I'm just using the acoustic voices- not the dance stuff. Also the styles and fills on Yamaha is much-much better than the PA80. PA80 has serious issue on the fill-in department.

This is a major purchase for most people. I strongly urge you to try it extensively before committing yourself. I tried 5 keyboards (low-end) before settling down with the PSR2000. Guitar Center allowed returns within 30 days which is VERY useful.