I would not use OSX in an average office environment at all. I used to be a developer and after that an IT manager. OSX is not good for offices (except in an OSX-only scenario), the people I worked with had the same problem as you with OSX and monitors. For development work I always used Linux, because I used to develop on Linux servers. I've not even tried to use OSX for dealing with different filetypes but have seen many problems in an office network - unless the network is a Mac network with OSX servers, it does not play well. On the other hand, the fact that OpenOffice really doesn't work well in Linux is just a massive problem. Many times I sent a file to clients and it looked horribly wrong on their Windows systems. Now I send a file and it always works perfectly. Also, files they send me would be unusable - formulas would not be converted well in spreadsheets, VB scripts wouldn't work and layouts were not good. I know there's WINE but this doesn't work with the latest MS Office well. This was the primary reason I dumped Linux. In my context - as an exclusively home system (I don't work with computers professionally now, I'm a teacher) - it is used for streaming TV and accessing proprietary services such as Netflix and Sky TV, as well as photo editing in Photoshop and video - it is better than Linux for these things and works flawlessly in this context. I don't have multiple monitors and I don't use text documents - only Office docs. With Linux I couldn't use Apple services like iTunes Match, streaming was broken, I couldn't manage my devices and I was limited to using bad Office software. I think the right tool for the right job is the best way to work.

I use OSX now, but only switched recently from KDE. The reason? I bought a Macbook Pro because I was getting really fed up with incompatibilities with Linux. I couldn't watch streaming without loads of problems (sports and movies from different providers had problems), OpenOffice was always making my documents unreadable by other people (I don't have this problem with iWork) and I couldn't stream movies from my desktop to my TV (I have AppleTV). I had been a KDE user for some 12 years, and hated to switch, because I love using it. I was never going to Windows because I've used 7 and 8 wasn't impressed at all. I decided that if people hadn't started to develop plugins and compatible web services for Linux after so many years of popularity, it wasn't going to happen. So... time to switch. Fortunately OSX has proven better in all regards - it's easier to use that any OS I've experienced and everything works perfectly.

Beta has now become a disclaimer, I remember well when it just meant 'all the features aren't implemented' now it seems like a legal get-out clause if something goes wrong.