Well the greddy evo was not going to be loud exspecially since your rollin a automatic. I say look into the other greddy exhausts. Maybe the SP? A one that is pretty hard to hear and not loud at all is the APEX WS. It is oval and has a nice tip. The DC sports one you are talking about I have heard and is very quiet. I think it kinda looks funky but if you cant see it I would look into it.

I say Greddy SP(or another greddy model), Apex WS, Dc sports.