If you really love the E70 screen, you will be sorely disappointed with the QVGA which is now the S60 standard. I love the high res screen on my N80 alot more than the QVGA screen on my E65. Also, the 2.2 screen size isn't that much of a difference compared to the N80's 2.0.
The only reasons I can think of going from a N80ie to E65 are 1)tired of carrying a brick around in your pocket, 2)you need blackberry connect or exchange mail server for push email, 3)tired of charging everyday and carrying spare batteries around, and 4)want a phone to play around with until the N95 prices stabize to the 550 Euro($700 US) estimated MSRP.