I made the move in 2006. Spent 4 years at HQ as GA Ops Inspector. Great money, lots of interesting work, great connections. Friends who are field inspectors have it good too. They do investigations, checkrides, POI work (they get typed on different equip) etc.
There are lots of opportunities to move around in the FAA and pretty much live where you want. They also offer flex schedules (work 9 hr days and take every other Friday off). It's a great move especially if you are interested in safety work.