Ok ok.....I get the picture.....forget the exhaust and go for more power.....what was I thinking!!! Consider me told!
In all seriousness, I hadn't actually considered remapping that much until I got talking to someone over the weekend and they mentioned the 400+ bhp remap for £225! And after reading everyone's comments here (all grately appreciated by the way) I think I will put the exhaust on the back burner as as Stu2w so rightly pointed out, the money the exhaust would cost would get so much more if put towards performance upgrades.
@chucky1 - Cheers for the detailed reply on the exhaust notes....I think your describing exactly what I'm looking for. Initially I was thinking exhaust as I really want to hear a bit more of that V6 purring. Yes it does sound good when giving it some beans and I love that cracking and popping when changing gear but, I find it too refined just driving round town. It's more that I want to be able to hear what the engine is doing rather than turning heads. Find it hard to drive in manual mode as I need to be constantly looking at the rev counter to see what's going on.
I also completely agree with the S4 being a 'sleeper' as you put it. I love the fact that its inconspicuous enough to look like that family wagon but hit that kickdown switch and it becomes a completely different beast! So yeah, maybe with all the performance upgrades I could get for the same price as the exhaust, that might have the desired effect on the noise coming out the back.
But.....and I think this may open a whole new tin of worms and I best say it quietly, I actually don't like the whine of the supercharger! Think it sounds artificial and too electronic. Now this is where I become a bit unstuck, I'm no mechanic, I'm more used to sitting in an office drinking tea and sitting with my feet up watching Windows progress bars, not having my head stuck in an engine bay so when it comes to the real mechanical workings, I'm a bit lost. So....is it just the pulley upgrade that makes the whine and if so, what does the air intake do then? Sure I've watched videos of S4's with air intakes making similar whining noises. Or I s it....
Pulley = Whine
Intake = That sucking in of air noise
I will definitely be doing some research on this tonight!