If your looking to get a keyboard long term, then also have a look at the Wersi OAS arrangers and the Lionstracs Mediastation, as these are software based and can be upgraded by software and internal hardware, thus negating the need to swap the board for another one.
They also give you access to the Akai Sample library, which means that it is most unlikely that you will not be able to find any type of sound you require.
Further to the above you can also load in VST instruments, which means the world of music and sound is your oyster.
Shortly for release (November) for the Wersi OAS instruments is the new Open Art Arranger which as well as updating the style section, has an additional piece of software that will play Yamaha Styles (Including Mega voice styles etc) without conversion, and not requiring any adjustments. (From the brief descriptions available at present, it seems that it may be Yamaha software that Wersi use under licence from Yamaha, but that is fully integrated into the OAS system) which means any type of style you require will be available.
The above instruments are more expensive then Tyros 2, E80 etc, but as they are upgradeable, in the long term they work out cheaper. (e.g. if you purchased a top line Yamaha/Roland etc in 2000, you will now have had to change the boards at least twice to get the latest sounds and effects etc, and which would have cost a considerable amount, whereas you could upgrade your Wersi OAS instrument to the latest specification at a fraction of the cost)
Demos of some of the standard sounds can be found here. http://www.boduns.starlink.ru/music/DEMO%20SYNTH/wersi/ which features OAS 6, and here http://www.boduns.starlink.ru/music/DEMO%20SYNTH/wersi%20oas%20EX-1%20v,7,0 which covers the latest OAS 7.
I think all the posts above have covered most options, so it is now over to you.
Enjoy whatever you play

Bill


[This message has been edited by abacus (edited 10-25-2006).]

[This message has been edited by abacus (edited 10-29-2006).]