Maybe you could get the Roland MC-303 Groove box. IIts pretty cool. It has 40 synth basses, 35 synth leads, and 33 synth pads onboard.
12 rhythm kits, built-in vintage synth sounds and arpeggios. It has an 8 track sequencer, and a whole lot of other stuff. Check it out!
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DJ SKY
P.S. There's also a MC-505 groovebox that I heard was hot.