If I didn't need the wagon action of an OBS and I had enough spare change to be thinking about buying something different, I would save up a bit and wait for some guy to sell his old decked out turbocharged RS. Or wait to find an RS really cheap and put a turbo on it myself.
I wouldn't recommend that route to somebody without the know-how or money to deal with something on it breaking down the road, though. Not that turboed RSs are horrible time bombs or anything, but stuff happens.
I can't see going through the trouble of changing cars without at least getting a better engine out of the deal, though.