You should always open your PayPal account for the country you have your bank account in. For example, if you have a bank account in the UK, you want to open a PayPal account on www.paypal.co.uk, if your bank account is in Brazil, then go to www.paypal.com.br, etc. I have 3 PayPal accounts: one in Brazil, one in Argentina and one in France, and I use each one depending on what bank account I need the money transferred to. But you can't get a payment on an French PayPal account and have the money transferred to a bank account in, say, Brazil.
However, luckily for you, since PayPal is an American company you can always transfer the money to a US bank account, regardless of where your PayPal account is based. Just log into your account and go to "Withdraw > Transfer to bank account", and you should see "United States" as the only option (since PayPal Argentina does not allow transfers to local banks).
Do not select the cheque option to withdraw your money. The only way you will be able to turn that cheque into cash in Argentina is to go to Banco Piano. They will use the official rate, take a cut, and ask you for a factura to prove where the money comes from. Some people used to do this before the cepo and often they did not get the cheque at all.