Some of the better ones I have had:
Rogue Shakespeare Stout (Had this 2 nights ago, its great!)
Rogue Imperial Stout (Expensive but great)
Rogue Chocolate Stout (Already said you like it)
Alaskan Smoked Porter (won awards for a reason)
Guinness Foreign Extra Stout (Its a classic for a reason, just pour it right)
DFH World Wide Stout (Will kick your ass, but its a tasty ride)
Great Divide Yeti (And it's varieties)
Left Hand Milk Stout (Haven't had nitro yet, but normal is still A+ to me)
Young's Double Chocolate Stout (Its not beer, its desert)