For an 02 Impreza WRX, which exhaust produces the nice 'boxer' sound without it being too too loud?

Ive seen the scooby world after burner wav files on their website and it seems 2 sound ok, does any1 have this? Or any other exhaust information that they would like to share

 

Depends on what you define as too loud! Even a prodrive backbox - which is pretty quiet by scooby standards - will produce a noticeable burble, although you won't notice very much at all when going at a steady top gear cruise. I have a full APS system. For some it would be too quiet (much quieter than many). For a regular Vectra driver, mine would seem very loud. For me it makes a great noise when you floor it, and is just noticeable at steady motorway speeds.

I've got a spreadsheet with some different noise measurements from some exhausts, mail me if that will help?