I've been a regular at Cocoa Amour Grafton St since it opened in 2009. The barrista really knows his stuff and nothing is too much trouble, ensuring you actually get a really great coffee every time. Their teas are nice too.
Their almond croissants are sublime, best I have ever had.

Approximate cost: $12

The cakes here are to die for. So fancy and yummy. The coffee is smooth and perfect everytime. Its so nice to sit here and look across the road to the boardwalk.