The real problem is there is almost no such thing as a bad demo. Manufacturers know this is what sells their instruments so they throw everything into creating these things. Demos alone are no way to choose an instrument. You owe it to yourself to go wherever you have to and try out several keyboard choices. I plan my vacations so I can visit major music stores.

Right now, the Tyros seems to be the hottest keyboard on the market (at least it's getting the most attention). And if you want the latest-greatest-flashiest arranger then go for it. But the Tyros feeding-frenzy has a side-benefit: many people will be selling their existing keyboards to get a Tyros, so there will be a good used market for top arrangers in the coming months. I have already seen posts in the Tyros discussion group where even 9000Pro owners are planning to switch... yet the 9000 Pro has features that surpass the Tyros in some areas like expandability/polyphony, 76-note keyboard, low impedence mic input, four outputs, gooseneck lights, etc. Nothing wrong with buying something that you can use and enjoy today and wait for the excitement (and price) to die down a little... you can always resell a good used arranger if you keep it in top condition and buy a Tyros or whatever competes with it later.

A final thought: you can buy two new PSR2000's today for what a Tyros will cost, assuming you'll be able to buy one anytime soon. Some people will never need more than a PSR2000 because it's a very capable instrument in it's own right. We are all acting like deers-in-the-headlights over new technology right now, but there are many good keyboards to consider in all price ranges.