i had the 10db kit on my 3.5 Mag and i love it, not too loud not too quiet. I wanted to get it louder with even more of a rumble so i added the 18inch Magnaflow muffler to replace the suitcase muffler (blastin bobs sells those to) and now its even more awesome, i have had comments from other Lx V8 owners telling me at idle it could pass for a V8, it is a little louder in the car whilst driving which took a little getting used too but with the windows up its not bad at all. My problem is that i love the sound so much i cant keep my foot out of the throttle.
I made a video clip of it not the best quality but it will kinda give you the idea.
that is the thread which i posted it in. If you should have any other questions please feel free to pm me.