For response you want low duration 250-260° with as much lift as you can get, in my rb30 I used a jun 264 with 10.5mm of lift and it sounded like a factory idle.
Piggaz is using a 260 with 10.8mm but wants to try a 250 and his car is 2.8L
But with -7s you may as well leave the factory cams in it cause they will won't flow real high into the rev range anyway