I am an SEO and web developer and so I will answer the part about the browser.

The n900 has the best online browser of any mobile phone or tablet BY FAR.

I tested the compatibility of the browser in many hard to handle pages. I owned and used Iphone, Ipad, G1 ( android ) and many HTC devices. So I am talking with real experience in mobile browsers here.

It will load and display complex AJAX pages that Iphone users can only DREAM of seeing in years.

After pr 1.2 the keyboard got much more usable by using long clicks.

So I would recommend this phone.