I have the NAD T747 driving 8ohm mains - 4 ohm centre and 4 ohm rears - no problems. If you run the Dali's in 2 channel you will be fine. The only issue might be in 5 channel with the Dali's running full range - even then at decent volumes you won't have a problem.
Ohm ratings are a bit misleading, since they represent an average across the audio spectrum. It varies considerably, with most of the issues in the bottom end. Not familiar with the Dali's, but I assume they are reasonably efficient - not 85db with multiple bass drivers. NAD has a pretty good power supply.
You will also note in NADs literature that the T747 puts out 60wpc in 8 ohms and 4 ohms. Go for the Dali's and enjoy.
Ohm ratings are a bit misleading, since they represent an average across the audio spectrum. It varies considerably, with most of the issues in the bottom end. Not familiar with the Dali's, but I assume they are reasonably efficient - not 85db with multiple bass drivers. NAD has a pretty good power supply.
You will also note in NADs literature that the T747 puts out 60wpc in 8 ohms and 4 ohms. Go for the Dali's and enjoy.