With 5 Macs, Outlook will be just too expensive for me. It is ridiculous not putting a mail program in the home edition. If Entourage was more stable, I would be happy to stay with it but like many folks, I find on Intel machines, it crashes about once a day (...and yes I have done the fonts thing and rebuilt databases). Apple Mail is not really a business product. Thunderbird was not bad when it came out in 2003 but has not moved on. Any other suggestions for an Outlook alternative?
Wilson
It depends on what you are using "Outlook" for. Outlook IS NOT simply an email client, something that most of the posters here don't even seem to be aware of. It's a full blown information manager used in conjunction with corporate exchange servers. When mated with a corporate database I can find address/phone books, company SOPs, schedules, historical job data, OEM manuals, and policy information.
I'm sure there's other standards but with companies with exchange, Outlook is the way to go (Just as Notes works well with Domino servers)...