While the label you mention is the longest "cellar worthy" example of this producer, a 2003 vintage is already 7 years old.... so my view is that this wine will no longer develop any additional positive characteristics. The trade off & the investment in cellar space is no longer warranted and as you wait further, I think the chances of the wine starting to lose more that it will gain (in my view nothing) just means its time to go look for a corkscrew.....