You made the right choice. I was an "early adopter" of this mod 2.5 years ago and used 4" tips. Although I wouldn't call them "ricey", they are a little bit disproportionately large to my eye and I wish I had gone 1/2" smaller. They weren't cheap though, especially with the labor charge, so I've never really considered changing them out.
Yea I have a 4" on my Datsun and thought it would overpower the look in the rear. each tip was $40, and $40 to weld them on.
This explains my screen name: