Lightest, least restrictive muffler for a 3.2?

[997Sbeebe]

I'm about to pull the current Fabspeed exhaust on my car (euro premuffler and Maxflo single outlet - will be for sale) and replace it with an M&K premuffler and muffler bypass. Just in case it turns out to be too loud for a frequent driver, I might have to look into the available lighter and least restrictive options out there. I'm currently running 200 cell cats and Fister IIIs on my 993 and love the sound. Any thoughts on the best sound out there, just shy of the muffler bypass option? If you like what you have, let me know your set up. Thanks.