As said nothing subsitutes a test drive - go see your local dealer. In terms of a good usable s$, they can be found, but they won't cost you much less than a new one would have - they are in limited supply.
A group of us will be in Scotland (See Lap of Scotland thread in events) week of 19th April - you'd be welcome to pop along to one of out stop off points say hello and get to see S4 Aero's and trads in one place and talk to owners. Might be worth considering?
