1st - it depends on which Blackberry you're comparing?

I would say the N900 is a better internet experience (I'm on VodafoneUK) - yes the battery drains, this less so when you're in a strong signal area than a low signal area. In honesty I've taken to using 1 battery during the day, 0700-1900 then switching to a 2nd battery in the evening (on weekends) to make sure I don't run out.