Take a peek at the hops I used in this recipe and read the tasting notes at the top too. I know it isn't exactly what you want for flavor but it might give you a better idea about hop choices and amounts.
http://hopville.com/recipe/1066896/american-pale-ale-recipes/citra-pale-ale
I brewed this again with the intention of getting more grapefruit and boy did I ever.
http://hopville.com/recipe/1068411/american-pale-ale-recipes/citra-cascade-pale-ale
Again, these aren't what you are looking for but notice the hop amounts and hop schedule and think how this might fit into your beer. Notice the different bittering hops and how close the IBU ends up with each other. Your lemon zest and coriander might turn the first recipe I posted into a lemon flavor especially if you moved the Citra hop addition earlier in the boil so you don't get as much aroma from it and then forget the dry hopping and do the lemon zest instead.