Uncommon around here, but I love Outlook. I've tried Gmail, Thunderbird, and others but nothing handles the Email + Contacts + Calendar + Tasks problem as well

Uncommon around here, but I love Outlook. I've tried Gmail, Thunderbird, and others but nothing handles the Email + Contacts + Calendar + Tasks problem as well as Outlook, IMHO. I've also used Basecamp, but I like having my To Do list integrated with my email.