Donny, Donny, Donny,
I love and have a Kurzweil. They are tops when it comes to digital pianos and synths, BUT the PC3LE7, which is a 76 board and probably what I might choose, lists at $2k, even the SP series is over a grand and I didn't care for the panel design on those.

Right now, the PX-330 is available from Amazon.com for $599. As the Keyboard reviews of that and the new PX-3 state, there's not much available as good as these two boards for twice the price.

What's attractive to me, and I want to check this out myself, is the accompaniment and sequencer features. If there are 6 good styles and decent GM sounds (which have been reviewed as weak) then I'm buying. For $600 I'd have a great piano keyboard, some decent speakers, styles and SMF playback via SD card. That beats a Prelude in my book.