Pods are a waste of time and money with your intentions in mind.
The exhaust and other 'efficiency' modifications are worthwhile that won't greatly contribute to wear like;
Lightweight flywheel/rims
Upgrade the engine management to a power fc or similar
Upgrading the cams is worthwhile to give you a bigger power band and make the power with less rpm, boost and intake temps. The fitting of adjustable cam gears even by themselves gets you some good gains.
Appart from that the maintenence program for your car is very important to enjoy it. Since the odo shows 78,000kms you don't know if the timing belt is done, so I'd be doing that along with the idler and tensioner and possibly water pump if required. A full coooling system service is also a must do, for the Aussie summer.