Michael Schlink:This "which computer" question comes up fairly regularly and as always there are many answers. Here's my .02. I have been diving computers for 20 years (I still have my Edge) My favorite by far is my Suunto Stinger. On trips I leave my watches at home and the Stinger stays on my wrist 24/7. If it's too big I haven't noticed.
I also dive with a Atom. Now I have had numerous problems with the Atoms and I wasn't too happy with Oceanic but after several go arounds I have another unit. I don't and won't trust it anywhere near the way I trust the Stinger. The Stinger has never failed, I've had NUMEROUS failures with the Atom and my wife gave hers back and opted for something else. When wearing both the Stinger and the Atom there is an obvious difference in the math, I just wait until both are happy before getting out of the water.
If I were to get another computer I'd probably go for a D9 so that I had a match to my Stinger, but more than anything I'd trust the D9 over the Atom.
you bring up a good point about the Atom. Oceanic released it way ahead of its time and many people got burnt real bad from failures, flooding and still short battery life.
I have the latest version so, knock on wood, its been trouble free after 50 dives. and one battery change. Every once in awhile the screen goes blank and then comes back. I have no clue why and its only happened in watch mode. (Scratches Head)
If money were not an issue, the D9 is the way to go.