I think you'll be fine money wise, as long as pay keeps up with inflation. Id push for a bit more on the housing allowance, 10000 gets you into a whole other category of rental.
trips home? transportation (car, taxis)? insurance ie: liability, possessions? periodically replacing electronic devices, (very expensive here)?
Just to clarify - that is 20-25K pesos a month neto + your rent paid? In which case yes, absolutely you can live well on that. I assume you will be getting health insurance through your work and your wife should be covered as well (check that).
I don't know of any of my Argentine friends that are making that much money, and they are paying for their apartments/cell phone/everything else out of that and doing just fine. I agree that this is definitely enough for you to live comfortably here, especially since you don't have to pay rent/utilities out of this salary.
My only suggestion is that you mentioned taking a cab to go out at night -- I'd recommend trying to take the bus, at least on the way there. the $65 you'll save each time will really add up over time. Even better if you don't mind taking it on the way home! but I usually splurge on the cabs late at night when I dont want to wait for the irregular nighttime bus schedules