Jetx
Jetx, I can only speak from a RAAF point of view, but below is some things that I think a chap like yourself should consider before taking the leap and giving up seniority at a major.
Passing BFTS doesn't mean that you will be offered a spot at 2FTS. You will still have to perform the RAAF way.
2FTS is geared around making fighter pilots. It is great fun as it containes a lot of stuff that civvies don't get to do. It can be very humbling to guys with previous experience.
If you make fighters expect to fly about 250 hrs average a year. This can decrease as you move through the ranks. I expect that this will also decrease with JSF as it is expensive to operate and will have an excellent simulation training system.
A lot of the other types are similar to the airliners you fly now, KC30, E7, P8, BBJ. If you fly them you will start at the bottom as a co pilot to learn your specific trade and there is generally no RPL. Expect the flying hours to be less than what you fly now as mission planning requirements are large and tasking can be erratic. The upside is that its much less mundane than RPT.
Ask yourself if you are suffering from the grass is greener syndrome. Most RAAF pilots at some stage (usually the 10 year mark) will entertain if not go through with getting out. Sometimes it is the grass is greener syndrome, but it is usually around the time you start looking down the barrel of flying much less( if at all) and doing more staff work. The usual flying career is one bog rat tour of 4 years then off to be some kind of specialist, FCI, QFI or Test/ OT&E pilot. This usually comes with a few years of moving around the county side.
If all of this agrees with you, then do it. There is two ex civvie reasonable time pilots flying hawks now, and loving it.
Don't die wondering.