Would these be good mods to start with?

VHRpurr

So... if you don't want to be loud, headers are definitely a no go for you. Headers make the trumpet sound go from loud to "Stick your head inside my trumpet and im going to blow as hard as I can, you'll take it, and like it". So.... if you don't want that, pass on them.

As for exhaust, its all personal...... I wouldn't trade my Fast Intentions full exhaust and resonated test pipes for the world. If you want ultimate power, just save your money, and buy a turbo kit with supporting mods. This car really could use a factory turbo... or 2.