I've been playing with dry hopped American summer wheats myself lately.
I did one that was all Citra and one with galaxy. Both dry hopped with an ounce for 7 days. Both were in the 28-30 IBU range before dry hopping.
Both are fantastic, easy drinking beers on a hot day. I think the light dry hopping balanced really well with the delicate wheat flavors. 2 oz. of dry hopping, might be too much, worth a try though.