Using E63 since July and it is very good, except the camera. It's keypad is conical so better typing than E-71.
E-71 has a better body (metal one), built in GPS and a 3.2 MP cam (which is slightly better than E63 but quality is so so.
E-71 is not doubt the best Nokia phone with highest reviews by tech gurus, but I chose E-63 because of 6K price difference at that time. I did not need a GPS in phone as I have a Garmin car navigation GPS (Nuvi 360 already).