As you now you can buy a Yamaha RS7000 - new - for about 1400 usd/euros
and with the same money you have another options
korg electribe ES1 - sampler (ebay 300usd top)
rm1x - sequencer (ebay 350usd top)
new emu's xk6 keyboard - new - (600usd top)
wich option would you preffer for starting producing some nice urban gigs??