D7 has a bit of flaire, nice pubs and also if you have family, it is the better place.
For sure around the airport there is also places to rent, however they also come for some price. Served 8 years in SGN and got robbed while asleep, maid left the balcony door unlocked.........landlord said in typical way: sorry, sorry.... That's been it. Moved to hanoi and found it quite good, safe place, landlord ok, rent cheaper than SGN, pick up on time, so nothing to complain.