Exhaust, filter, body kit etc

[xlr8gtst]

Hi people. Im looking for advice/help with doing a few basic mods to my recently aquired (and extreemly stock) r32 gts-t coupe. I live in Hamilton and idealy would like to get any work done locally.
The list goes like this:

Exhaust and filter on a budget. This is likely the only performance enhancing mod I intend to do, I dont want too loud and only plan to spend around $500-$600.

Lowered. This is purely for looks, just as long as my car doesnt handle any worse than stock (should also mention its 4ws).

Body kit. Where abouts would I source a factory kit (side skirts etc) and how much do they cost?

Id love to hear about anyones experiences in doing any of the above.
Cheers Glen.