Suggestions Please.. Stout

[Gsusbrew]

Hey Gang I recently brewed a dry stout. 10 Gallons split into 2X 5 gallons batches. 1 am am going to leave as is. The other I would like to add something to secondary . Some sort of flavaour and I am looking for your suggestions..
Here is the recipe
15lbs 2 row
2 lbs flaked barely
3 lbs roasted barely
2 oz Black patent
1 lbs crystal 60
Nottingham dry yeast.
4 oz Willamete at start of boil..
OG 1.045 (mashed at 152)
I would like to know what you think might be something good to add to the 2ndary to give it a unique flavour and make it different from the other 5 gallon batch of stout.

Cheers In advance!

 

[McKnuckle]

Coffee, chocolate, vanilla, peanut butter, oak chips, cherries, blackberries...

Hope that 14% roasted barley works out okay.

 

[MHBT]

i would drop the R.barley to 1.5- 2 lbs max..yeah chocolate and cherries would be interesting.