I just tasted the Antwerpen Stout from Guinness at the Cincinnati Winterfest this weekend and can report that it is an outstanding beer. Having just had the Guinness Extra Stout a month ago, I recognized that the Antwerpen Stout amps up the gravity and the richness of the dark fruit flavor. I feel its well worth your investigation.
At that same event, they also had their Rye Pale Ale and its OK. Not bad, but nothing to seek out.
While I was writing this message, I visited the Guinness website and see that they have a bunch of beers that I haven't seen on the shelves or taps. After tasting the Antwerpen, I'll be more open to trying them.
Enjoy!