Looks like Arie needs a workstation?
Someting like the W-30 but with better sample-functions.
Unfortunately there are noo cheap workstations around anymore, just Korg Karma and machines like that.
Too expensive and most of the functions ruin the creative flow. Well, a question of taste and workflow, of course, but I wouldn't be able to write something clever with that.
The problem is, that with a synth alone you won't get very far. You'll need something to sequence and something that provides beats and other stuff, all the things Zed mentioned before. But maybe you just want to have some synthsounds?
Okay, if you're *only* looking for a synth, I'd recommend
something like the Nord Lead II or a Virus B.
It really depends on what kind of sound you wanna create.
The Virus for example is said to be a trancey machine - don't be afraid, it doesn't mean you can only make trance-stuff with it, it's totally versatile, but it has this certain twilighted feel to it. Can't explain it better. A Massive Attack machine.
Whereas the Nord Lead is much colder and harder, it's more the one for crunchy lead-sounds and in-your-face-stuff.
Both are avaible with a clavia.