I agree. Best for you to try them yourself if possible. Both are quality boards. Depending on what you have played in the past and which Operating systems you may or may not be familiar with, all things being equal most users will probably find the Yamaha O/S a bit easier to learn and understand. That said, a lot of it depends on you and your goals with an arranger and which one has the styles and sounds you prefer.

When you say editing, if you are including sounds, the PA80 will give you the most editing power of any arranger. If you are leaning toward dance / electronica, the PA80 will likely have the edge. Style morphing is a breeze in it too. The sounds inside both boards are excellent. The Tyros has some beautiful acoustic sounds, and the PA80 is not far behind ( if behind at all ). The PA80 lacks a bit in piano sounds vs the Tyros, but using performances ( layering individual sounds ) and the detailed patch editing taht is available on it.. a pretty good piano is obtainable. The styles.. all a mater of preference. Tyros styles sound more alive to me than any of the previous Yamaha arrangers I've worked with. The PA80 has very realistic sounding styles. Again a matter of preference.

I agree also with the thought of using an external sequencer. For about 30 bucks, Cakewalk Express will give you a lot more to work with than any internal sequencer can. It also does a good job with audio as well. N track studio does a great job with audio and from my understanding the midi sequencer is much improved in the latest versions.

AJ