Maybe 61 note keyboards you can swivel enough to get to the 'edges' of the keyboard comfortably enough, but I have found that 76 note keyboards really need a bench, where you can slide up or down a little, otherwise your wrists get a bit too tweaked for comfortable playing at the extremes.
Just a consideration.......
(and have you noticed how heavy one of those drum thrones is? Many people would rather play 61 note rather than 76 to save themselves 20lb extra in the keyboard, then lug a 30lb stool around!)
[This message has been edited by Diki (edited 08-23-2005).]
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An arranger is just a tool. What matters is what you build with it..!