Hey Killarney,
I'd have to disagree with Belgrano as a neighborhood choice if you're just here for three months, maybe longer.
I lived in Belgrano when I arrived a year ago, then microcentro, then Recoleta/Barrio Norte close enough to walk to Palermo Soho.
Barrio Norte/Palermo Soho wins hands down.
Here's the thing, as a newcomer with limited Spanish here on a possibly limited trip, you'll be enjoying the access to foreigners and locals that neighborhoods like Soho can give. There's not very many places to hang out in Belgrano. The taxi is expensive, maybe 25 to 30 pesos to Soho or Recoleta, the subway closes at 10-11 and when you are drunk and hot this summer, waiting for that bus will not sound fun at four in the morning.
People get tired of Recoleta and Palermo when they've been here awhile, but it's nice when you first arrive.