Money is NOT an objective...... if money is not a problem I'm sure just about everyone on here will recommend either the Kurzweil K2600 (with sampling of course) or the Korg Triton..... what kind of music are you trying to do. I use a Roland XV-88 which works really well for most acoustic type stuff. Ask some more specific questions please. At first glance.... I'd probably say Korg Triton 88-key with MOSS expansion board added........ this'll run you around $4000 or so.

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John 3:16 For God so loved the world, that He gave His only Son, that whoever believes in Him should not perish, but have everlasting life.