I'd say go with the N900 because it has potential to become great, yes everyone knows the hardware in the N900 is great and it really is. I'll list a few problems that i'm having with the N900 after nearly a month having it.

1. Battery life is terrible i just really is an example of this is yesterday the phone was fully charged in the morning i switched it on for around 1 hour before work and then it was off for 8 hours. Around 2pm i switch it back on and i switched to 2G to save on battery i listened to some music for about 40mins coming from work i texted my gf through out the evening and some web browsing via wifi and the battery was dead by 7pm no joke.

2. I said it in a previous thread about how music will stutter when browsing the web sometimes.

3. OVI store is bare bones for the N900, yes i know the app section for Linux is filled with apps which btw are mostly useless apps for the average user. But as it stands the OVI store might as well not be an option to click on.

They are my issues with the N900 but everything else i love about the device overall and if you think you can handle at least the battery life issue then buy it.