thehandler, I have an e-bijouterie store in Las Canitas. I like the place alot; it is always alive and though on the expensive side, it is a happening place. That does not preclude you from stepping outsde of LasC to venture and meet people and see other places (San Telmo, Recoleta, Palermo, etc). But this area is safe at night even very early mornings to walk around.The crowd is mostly of your age group with lots of places to eat, a plethora of people to meet and sounds to enjoy and the vibe is different in LasC. When you get to BsAs drop me a line. You will love BsAs. And just from a personal POV, the first time I saw LasC I fell in love with it, and all the other places paled in comparison to it; oh yeah others have charm and all that but I am all about energy and warmth. My family loves this place. I do not party much but my neighbors sure does.
I will not sass talk other places because I have not lived anywhere else but LasC. I love it here. And if you get bored of the hustle and buzzle of the city, there is always the countryside to go to in the weekend.
My son (young adult) loves it here (when he gets around to visiting his mother!). You have to come with an open heart and a good dose of open mind; it is different but again, you are stepping out of your comfort zone so you should expect it to be different; take the minuses with the pluses.
Stay for a week in one place Palermo or Belgrano, and then do daytrips to the other barrios and see what you think. If noise is not tolerable to you, you should try to visit the places you are considering at night - no matter how great the view if you need your Zen moments, it pays to be diligent when choosing an apartment to commit to.
Ciao and good luck.