You might try the Spring Hotel. I stayed there a few times, though the last visit was 3 years ago. Great location for walking & dining. Hotel is quite clean, has elevator and free internet, good breakfasts.

A suite is not much more costly than a basic room, but you get a lot more space. Some rooms have no windows, which can be nice if you want a quiet room, but not if you want a (limited) view, so ask before you book.

We stayed at the Metropole for the swimming pool and the gym on the roof-top. I like the location enough but some people said it's not central enough. I remember thinking if being in the action means noisy I rather be a bit outside of it. The stuff were professional and there was free wifi in the lobby only but not in the room. The breakfast was a nice spread of both Continental and Asian food. Get a room away from the nightclub which we did, no noise whatsoever at night.

http://www.tripadvisor.com/Hotel_Review-g293925-d302782-Reviews-Metropole_Hotel-Ho_Chi_Minh_City.html