Nobody can recommend whats best for you - unless we know you and your habits really, really well.

Having said that, I wouldn't use the N900 as my primary or only phone. (And I say this although I absolutely love the device and think Maemo if the most advanced mobile system ever.)

It's just that as a phone, it's full of compromises. Touch screen instead of real buttons, lacking dozens of features you take for granted in a $50-phone, heavy, big,... No, not as my main phone.

But you know... You may be the person who never needs the lacking features, who prefers a touch screen and who loves to carry big things in the front pockets. So how would my POV help you?