Yep, im from the riverland too. i like the fact that there arent many imports around... makes my car more unique.
i can do the freeway - adelaide in a bit over 1/2 an hour on a good day (speed limit too)
Azza - make sure you come on one of the sa cruises, great bunch of people, and really good way to get to know the import scene here.
as for workshops, i recommend Boostworx for mech/tuning work.