I've got a stack of impy stouts in my cellar (aka beer cupboard). Gave away one of my last batch Yellow Belly bottles the other day. They're one of my favourites. I've not actually tried the Sundae (BA) version.
Funnily enough the best one I had was with a De Molen Rasputin (it is possibly my favourite beer).
A few borefts beer festivals ago someone was selling ice cream made with various Dutch beers that were stupidly good - I never got their name though so don’t know who to look out for.
Yellow Belly Sundae Sundae
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