I've done both and dry hopping does add a bigger waft of hop aroma. However, I like to add 1oz of hops at 1 min or at flameout for my pale ales and IPAs. It gives me very good aroma. I will say that I do not filter out my hops from my wort. I let them all sit together in my fermenter and I don't secondary. If I do secondary I get clearer beers but then I do toss a couple ounces of hops in a mesh paint strainer bag to the secondary to give a big aroma effect.
That's just how I do it.
Take it easy and have a great Easter everyone!
Chris