Hey, I just went to BA for 3 months and lived there with my wife. Ok, I'm a bit older at 35, and granted I was with my wife, but I recently married and definitely had an idea of where I would have lived had I been single there. My first choice would be as close to Honduras and Jorge Luis Borges as you can get. There's a circle there with a great scene of good restaurants, shopping, and bars. Very upscale area with gorgeous women everywhere. The only drawback is that it's a little distance from Santa Fe and any main shopping. One key point that no one has told you is that, although wages are low, restaurant food and cab fares are also a quarter the price they are in the states, and tips are nominal. Oh, only use the radio taxis, and don't tip them...they don't expect it. They'll even round down to the nearest dollar. Definitely, avoid the bus system, take cabs when the subway isn't convenient, make your way to the other side of Santa Fe to the parks, go up to visit Belgrano for that old Italian feel, go down to experience Plaza Dorego and Parque Lezamo in San Telmo on the weekend, go further down and toward the water to experience La Boca on the weekend (in the daytime!), go up to the Mataderos fair in Matederos I think on Sundays, take some tango lessons to meet women (not as much pressure as Malangas unless you already know tango), go to the movies since they are mostly in English with subtitles, and make your way over to Uruguay (old town Colonia) with some girl you meet (or further east to the beaches...still have to go through Colonia to catch a bus to the beaches) on the Buquebus, which you catch down past Casa la Rosa at the end of Ave de Mayo (you might need to do this to renew your Visa anyway since you have to leave ever so often if staying for over a certain number of months-this is the cheapest and quickest way to do that). Have fun...first two weeks will be frustrating just getting oriented with the city...it's dirty and 10 times the size of Manhatten, so be prepared. The subway system is easy, but I still say stick with the cabs, especially if you have to transfer trains...it gets smelly and crowded down there. There are tour buses to get acquainted, but if I had to do it again, the first cabby that spoke English and was cool (there were some), I would have paid to take me around the city. We just learned on our own and wasted a lot of time doing it. There are my two (or twenty) cents..... Good luck...I hope you're prepared to eat lots of meet. It's all about the lomo and chorizo