Best overall....

[Beermaker]

Kinda partial to Karmeliet or Deleirium Tremons. St Bernardus 12 is close.

[ruggerlock4]

Had St. Bernardus 12 for the first time over Thanksgiving, By far one of the best beers out there.

[Dextolen]

St. B12 gets my vote. I have not had Westvleteren's 12 yet, not sure when I'll be able to.