Although HCM and Hanoi provide more business activities and night life, Da Nang seems to be a good city to settle down. I was at Da Nang recently and found that it does not have the crazy traffic and the place is well develop and plan. The city is clean and have some great beaches. It is located very close to Hue and Hoi An, the very popular tourist destinations. The cost of living is lower then Hanoi and HCM city too. The night scene on the river Song Han is quite interesting with people dancing, exercising, strolling, and with great illumination decorated on the bridges. Check out my blog on Bach Dang street in Da nang.
http://sensesofvietnam.blogspot.com/
What do you know about Da Nang?