[Gustomaximus]

I ran 5 calendars simultaneously recently to choose a preferred option.

I went with Google calendar with Outlook a close second (also tried sunrise, cal and Business calendar). I quite liked Outlook and would have gone with it as my joint mail/calendar but found it would slow down and crash with larger mail accounts.

Whatever you like its quite a good option to install several and use them side-by-side to get a feel what you like. I did the same with mail clients too and ended up with Nine, again Outlook being a close second.