Feather v Bumper

I'm torn between my buddy keeps telling me to order the the Feather over the Bumper because its better to have the back covered than exposed. Blah blah. Said it keeps the profile slim and as long as I have a screen protector on the front I'm good to go.

I like the bumper but sorta get where he's comin from when he says it should be "enclosed". A bunch of my buds have the feather on their 3G/3Gs and swore by them. One of my friends showed me his 3G after the Feather was taken off and he had tons of nicks all on the back of his black 3G. He did admit that he never took the Feather off to clean it so there was caked in dust and dirt.

What are the pros/cons of the Feather?
What are the pros/cons of the Bumper?

Should I just order both

Drop protection is sorta important to me even though I maybe dropped my 3G 2 times in the 2yrs of owning it. Once on carpet and once on the street. Having it keep its original profile is also important to me, ease of draw from pocket is important... help I'm torn, hahaha