Yeah, don't get me wrong. I would probably love to go Linux, even though I think Windows 7 works great. But I like the philosophy and customizability of Linux.
It's just that it's not entirely my decision. My clients require Outlook support (is there any app with full compatibility regarding scheduling/appointments etc?) and I need to be able to send, receive and work on psd:s and Illustrator files, since they are the defacto standard. I suspect the compatibility of the apps you list is not 100%. Please correct me if I'm wrong. Agree on Adobe prices, they are ridiculous.