Hi Jason,
I'm using an EPL1 which is only about 6 months newer than the D300s and was a much less mature technology at the time so I hear you about upgrades. Then again, it is all about the glass and strobes (which you've clearly prioritized) underwater. Quite a few people are still using D70s and D200 era to good effect. I hear you about upgrading. I was considering the EM5 as it would be a great topside camera too (I only travel with 1 camera anymore), however olympus changed their port design so my Zen dome doesn't directly work (there are adapters). I think they have kept the Pen dome fit for the EPL7 though so that might be my option. A friend has one so I might borrow it a day and see how it shoots topside. I also need a second strobe. Decisions, decisions...
thanks,
rick