Either Sven or Raineri will be a massive improvement over Houllier, for that matter, ther are a handful others who would be able to make an improvement at Liverpool.
However, it does seem that Ericsson will more likely be at Chelsea rather than Liverpool. Raineri has proven that he can handle a cosmopolitan side like Chelsea but can he excel at Liverpool with less of a cosmopolitan side than Chelsea but with way too many Frenchmen?