I have around the same time left to serve and have been watching the recruitment scene pick-up. I've decided to stick it out for the last few years, take gratuity and pension and then go.
If there is not a major incident over the next few years then there's no reason why recruitment won't continue to pick-up and the civvie market prosper.
However, if you jump ship and there is a major incident in the next few years then you could face the problem of 'last in = first out'.
It's a decision to take a number of sleepless nights over.