What do you need to sync with Outlook ? E-mails? Or Contacts, Meetings, Tasks, Notes and Files ?
Through Nokia PC Suite, all S40 and S60 Nokia phones sync with Outlook? Everything but e-mails!
So, Nokia E51 is a good option, but its SAR value scares me a little.
Otherwise, there is Nokia E65/N81/N78/6120 on S60 platform (smartphones), or even Nokia 6555/5300 on S40 platform.
Rockado