Actually, I'm comprehensive. I just had a ton of retina experience in residency.
I inquired about the nw8f capability for capturing the periphery, and the vendor told me about "internal fixation, mosaic style" which I have no idea what it means, but he says it goes out to 92 degrees. I'm still going with the nw8f because the nearest vendor doesn't sell the canon, and I'd rather have good relationship with someone nearby for future maintenance issues. Also, I don't anticipate doing too many fa's anyway. Are you hiring a photographer or tech? I'm going to start out doing the whole thing on my own, since California doesn't allow photographers to start IV's anyway.
I haven't looked at the OIS. We did use the imaging software in residency, and I thought the graphics were good, albeit super slow. I did think that OIS emr was crap though.
The other camera I saw on the market was Kowa VX-10. Not sure what reputation Kowa has, but you might want to look at it.
As for OCT, I got the Cirrus 4000. Would've preferred the Heidelberg, but not for $100k+. I still don't know what the difference between a Cirrus 400 and 4000 is, but got suckered into buying the 4000. The Topcon SD OCT actually looks pretty decent too by the way.
As an aside, I've been blogging every step of my startup experience. Feel free to check it out at
http://iballdoc.blogspot.com. Good luck with your practice.