I too was a a staunch Olympus fan - until the E3 (E1,E300,E410,E500 and I still have a bag full of om1's,2's, and a 3 with all zuiko glass).
The new gear failed to live up to what you should expect for over a grand Sterling , hence Choose your camera wisely as it expensive to change your system.
If the camera you need costs a little more, then save some more for it.
Aircraft photography needs a little more high spec equipment than motor racing.
350 plus mph at airshows with poor contrast between a grey aircraft and a grey sky shows the limit of a poor a/f system really fast - as I found out.
The new camera exceedes all expectations and with the new 400x compact flash cards the old full buffer problem is now a thing of the past.
In a world where true progress is rarely seen, at least photographic equipment is improving.