N900 all the way. I have both and my N97 is collecting dust. Trust me on this one.

Yeah well i have never used the N97 but did alot of research on it untill i found the n900 and fell it love with it, even though the battery life is just sucky, i fully charged my N900 lastnight woke up today with green light headed out for a few hours just got home and its dead, i was browseing the web for an hour, while using the FM transmitter in the car and a few other things, so it lasted me around 4 hours, pretty stupid but this is not even a real problem for me, as i have a micro usb charger at work, have a micro usb charger in the car and at home, so all is good. Last phone was the N95 i could never use that again, apart from the GPS maps on the N95 was 2nd to none. But IMO you should get the N900 so much more to do with this phone. I lay in bed most nights and sit on in for hours before i fall asleep just tickering around with stuff.