Exhaust and Muffler Recommendations

I might do dual exhaust on the 318 with 2 1/4" pipes and Flowmaster 40s. I've had them on two of my other cars and like them. I believe I read here that dual 2 1/2" would be too much for the stock motor.

I like how the factory tailpipe is barely visible, so I was thinking about keeping it less noticeable and clean.

Any recommendations other than Flowmasters?