A bit of wisdom...eliminate all of the canister or "N1" style mufflers right off the bat. All of those mufflers lack enough physical volume to quiet your exhaust note.

If snow (and therefore salt) is an issue, buy the Apex'i WS2 rear muffler.
Then have your local muffler shop fabricate the rest of the tubing out of stainless steel 2.25" ID tubing, using mandrel bends.

The Apex'i rear muffler uses 60mm inside diameter tubing, which comes out to about 2.36". You're better off keeping the diameter of tubing constant from the exhaust header all the way back, but you'll be fine with a minor increase that far downstream.

Also, I would add a perforated core resonator between the flange downstream from the catalytic converter and the first bend you have to make to clear the gas tank and rear subframe. The full cat-back WS2 (which I run on my Integra) uses a similar setup and it's needed to keep the exhaust from getting too boomy at highway cruising speeds.