Cobb's TBE is supposed to be quiet and probably will be the most 'liveable". I think at idle it's actually quieter and at WOT not much louder...sounds nice though. Their WRX system is around 1225 though....and the MS3 may cost a little bit more (has muffler and resonator vs just muffler for WRX). Corksport's TBE is like 800 when you buy it all together. I've PMed a couple people who have the corksport TBE and they have all said it's not too loud or anything. One person liked it a bit more keeping the stock mid pipe (cat)..said it wasn't quite as loud. I'm probably going to get a high flow cat for the mid pipe, that might quiet it down a little. But... I haven't got mine yet so I don't have any first hand experience for ya.