Yamaha • DX-21

A consumer level DX synth that sounds just like the DX-100 - thin and brittle. Following the DX model this synth also uses FM synthesis which is difficult to master. You will need to program this synth to get better sounds because the presets are only moderately useful. It's capable of a good string, bass and droney-pad sound as well as industrial sound-effects and metallic like sounds.
Still it makes a better option than a DX-27 or DX-100 because it has the capability of layers and splitting the keyboard and there is a chorus effect. Portamento and a Unison Mono-Mode are also nice features for screaming lead synth performances. For a cheaper source of DX sounds with moderate programmability, check out the DX-21. It's been used by Hardfloor, Level 42, Brother Beyond, Astral Projection, Technotronic, Vangelis, and Norman Cook (Fat Boy Slim).
I agree that dx-21 is for real synth lovers, but i think that it is still moderate because it can be used as noise/drone instrument. In Minsk (Belarus)for example, a lot of underground listeners still like my droney interpretations of popular songs, though the synth is about 80s...
http://www.yamaha.co.jp/manual/english/result.php?div_c ode=
I Love mine,
I paid $100 and at first was put off by the programming and was going to sell it.
Them I found another site that helped with the Programming.
It is a great lead synth and a valuable instrument.
http://www.burp.nl/dx/
This site brings out some points that the Manuel Misses!
Enjoy!