PHeMoX wrote:It's a bit difficult to explain, but I mean how you can literally just change a noise or sinus wave, build several layers and change it into something very original.
Sorry being anal about it again, but doesn't every proper synthesizer do that? (except when it doesn't have sine or layering, obviously)
Anyways if you're looking for a small synth, you might want to take a peek at such funky tools like Korg Microkorg, Alesis Micron, Xiosynth, or even Roland SH-201. All those are "virtual analogue" aka digital subtractive synthesizers enabling you to shape the sound to your liking, including the stuff you described.
EDIT: Don't forget the Waldorf Blofeld Keyboard either! In terms of synthesis functions and features, it pisses all over the rest basically. Widest range of sounds of them all.