Pepe wrote:KORG Wavestation
KORG Z1
^Another vote for these ones right here! Used to have a WS, sold it for the Z1. Complex ambient textures is what they excel at. Also, Yamaha SY-22, SY-35, and TG-33 (all basically the same thing) are good on the cheap. You can blend 4 sounds together on the joystick.
But to be honest, it's more about creative programming, and the right effects. With those, just about any synth will do.