If you go Korg
: sampling was an option
, so bypass any units that don't have it installed. Outboard sample storage is SCSI, in some cases an optional card is required so preference to units that have it already unless scrounging eBay for accessories before you can make music is your idea of fun
and Motif ES
(skip the original, it had SCSI and only 64MB of RAM...6 minutes) are pretty good samplers although lacking one common feature, loop crossfading. Original Motif maxxes out at 64MB, 6-1/2 minutes of stereo samples, backup is SCSI (interface built in you just need drives) or Smart Media (128MB card today will cost you $75 or so
). The ES can plug in up to 1 GB of RAM (about two hours stereo sampling) and load/save with USB sticks or hard drives but loading is slow (though still faster than floppies). Reloading the whole 1GB takes over an hour
so buying a cheap UPS at Staples and leaving the thing on all the time might be required. Both have insane effects processing with resampling through effects possible, also integration of samples and sequencer is top notch.
Going Korg or Yamaha expect to pay $500-1000 (not cheap) depending on model and provided accessories.
I listened to Hatfield and the North at Rainbow. They were very wonderful and they made my heart a prisoner.