Apples in secondary? and my grain bill

[mcgeeman]

First off im very open to suggestion. secondly this will be surprise for my girlfriend's bday, so any advice is extemely appreciated.
This is the grain bill I decided on:
8lbs maris otter
1lb carapils
.75lbs honey malt
1lb corn
1lb 10l crystal
1oz citra @ 15mins
1oz amarillo @15mins

both hops are leaf.

Ill be using pacific ale white labs yeast.

please criticize

i was looking for information regarding adding apples to secondary aswell. i cant find any information online about using fresh apples, the amount to use or the kind that would provide the most crisp fresh flavour. i was thinking possibly granny smith or a mix or red and green?

thanks!