I'm not worried about the plastic (PVC) body because it well engineered and feels firm.
The bottom-part looks like ABS but I'm not sure it is.

Ketrons' SD1 housing is metal and the wheels are well positioned above the keys.

Korg PA1Xpro is HUGE and the weight is HIGH, in fact not really suited to take on gigs.

My observations on the Tyros :
Compact 'leightweight' housing.
Very well organized panel/display.
Easy to operate.
After some time you get used to the keyfeel and easy/smoothly playable.
The styles are superb.
No latency, no polyphony problems.
Bright clear sound without noises.
Disk-handling sooo easy compared to the SD1.
Silent harddisk.
The buttons-clicking a little too loud.
The buttons-illumination a little too bright.
One Touch setting works great.

Tonight I tried some converted SD1 styles on the Tyros, but deleted them after that.
Original Yamaha styles are the very best and all converted stuff or other brand styles just sound not half as good.

The MIDI-file playback sounds very good...
Yamaha convinced me : They know how to build an arranger keyboard !
Some people told me : "You'll absolutely miss some best SD1 styles and want them on the Tyros!"

After almost nonstop-playing exploring the Tyros I cannot think of SD1 styles thatI want on Tyros!! (All we need, and more is in it)

Alex:
Oh yes I do use the pitch-wheel for harmonica, clarinet, trombone, sax etc.


[This message has been edited by Roel (edited 02-15-2005).]