The best selling nokia phone is the Nokia E7-00 Smartphone. It has a full keyboard, and 16 GB, a touchscreen and an anti-theft program. You can multitask without running the battery down.
Nokia N91 apple Ipod is also unable to beat this monster
Nokia N95. It maybe small and it may not be touch screen, but I think N95 is the best Nokia phone.
The Nokia N8 is a great choice.
Nokia N96. available on 15th of September 2008