The DX7 is really a very good synth. You can create manifold sounds not reached by others synths (especially harp digital sounds). But if you are quite new on synths I would not suggest you to buy one because it is very complicated and difficult to program. The accoustic piano sounds are rather ridiculous from today´s point of view, the synth-sounds aren´t comparable with those of analogue synths. However, the DX7 is very good at organs, basses (synth or electric), e-pianos and metallic (bellish) sounds. If you really want to buy a synth of the DX7-family, then buy DX7IIFD or TX802. They both sound identically, but better than the original DX7; DX7IIFD has got a 3.5" floppy drive, the TX802 is the rack version of DX7IIFD and has 8 audio outputs. They both just cost a little more than the DX7.