If you're shopping in the $1000 range for "new" to fit your need the choices would be:
YAMAHA: Nothing.., as even their MO series starts at $1199, but DOES NOT read samples or load in new wav data. It's a "what you see is what you get workstation"
ROLAND: $1000 range for them would be the Roland Juno-G. Cool little workstation with Fantom based sounds, audio recording, SRX expansion and it will load in samples. The G's sound set covers a wide range of genres.
KORG: They have the TR series. However, it starts at $1000, but sampling is an option and is upwards of $200 extra to install.
Used: You could probably find a nice Motif Classic 6 or a Motif ES6. I think MusiciansFriend was blowing the ES6 out at $1299. You could also look for a used Roland Fantom. Also have a look at a used Korg Triton...
Best Regards,
Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.