Quick background: I'm a Mac user looking to transition to Windows (using Parallels emulation software). I'm going to start with Windows 8.1 Pro, so all my questions will be based on these parameters. I'm a graphic designer by trade, working for myself in a small home studio and I collect software like Charlie Sheen collects STDs. But enough about me! Right now I'm wondering if there are any email client choices other than Outlook? What are the best, in your opinion and why?