I own a Sterling ray34. They're great basses for the $, but a German Wick is in another league. Are you wanting to buy a Wick new or used? Either way it really comes down to how much you want to spend and what preferences your looking for since they are two different animals in many ways.
If you planned on buying a used German Wick, I'd go that route since your in a closer proximity $ wise to a new Sterling ray35, the German $$ are just awesome. Catch a sweet deal on a used Wick. You can always revisit the Ray35 later since they're affordable new or used.
Good luck and keep us posted