Chipped, questions on what I'm doing next

I got a chip like 2 weeks ago and I have been needing a DV and been wanting to do a few other things

DV: I need a DV, I'd like one that makes a little more sound then stock, but I don't want anything loud and obvious, which should I choose?

Intake: I hear I don't need a cold air intake, so should I just get a regular KN air filter? any sizes or part numbers to reccomend?

Exhaust: I'm thinking of a Borla exhuast, there is a shop nearby that can get one in for 750$CAN for full catback, does this sound good? I want an exhuast that isn't extra loud or anything. I want something classy. Does this sound good?

Snub mount: Is it worth it with just a chip?

Also, I have a big scratch on my trunk (from previous owner) and a dull spot on the paint where old dealer stickers used to be, can a auto detail shop fix this?

edit: Also, I would like an FMIC, I wanted a kit that fits with all pipes, but they all seem to be like 1000$, there is the 150$ fmic on diy, but I would like the correct fitting pipes, is there anything in between?

Thanks,