Well this may sound odd but I recommend an older analogue rhythm machine . I have an electribe ER-1 but that's a drum synthesizer and you build your own sounds as well as program your rhythms . But an older analogue rhythm machine is very versitile and you can't program them ( usually they are preset ) but they have a lot of different rhythms . The analogue sound is great for ambient music or new wave . ROLAND TR-77 ( 1972 ) , KORG RHYTHM 55 ( 1979 ) , KORG DE 20 DONCA MATIC ( 1968 ) , ACETONE RHYTHM ACE FR-2L ( 1974 ) just to name a few .