Suits kick ass, I have three, one still needs to get taken in though, the arms are a bit to long, its been needing this alteration for over two years now. Actually i have four suits come to think of it.
I think they are something that you dont wear all the time, but when the time comes that you need one you will be happy you do. I think the rule of thumb is one blue, one brown and one black? I dont remember exactly.