Third N900 going here, own phone.

As a business phone, I've tried a Lumia 800 and an iPhone 4S (both for about 1 minute, they were horrid), then used a an old Desire Z for some time until we bothered to order me an N9. The Desire Z was pretty bad as well, and honestly even the N9 is no replacement for the N900.

So, I'd just buy another N900, unless something truly comparable hits the market.