G'day Otis,
I'm in the boat you are describing. I spent 10 years in the RAAF and have been with Airservices Australia for the last year and a half. I had a hoot in the RAAF with some great times (and some not so great) but on the whole, I enjoyed myself.
When it came to start the baby farm, we decided it was time to stop moving and come home. I decided to go enroute as I was guaranteed of staying in Melbourne. I got a shorter enroute course (abou 5.5 months) but started on the same wages as an 'off the street' person.
Now, AsA is recruiting 'controllers with previous experience' for TWR/APP spots, with a 6 week course and guaranteed postings for 2 years - and you get to apply for the spot of your choice so you know where you're heading. The wages at the college have imporved (about $46,000p/a) for previously qualifed controllers.
So, in answer to your question, it's not a dead end job in the RAAF if you wish to continue (at the moment). However, doors won't just open up - your RAAF qualifications are not formally recognised by AsA. Some overseas employers (Airways NZ for example) will recognaise and pay accordingly. AsA will not, but are quite happy to take you and your skills.
Hope this is of some help. PM me for more details if you need. Cheers all,
NFR.