It may be too late to give you a useful answer, in case you already went, but perhaps this may help someone else... (report back if you already went!)
You'll have a slightly elevated view (perhaps 20 cm), so you'll be able to see clearly. This "1" area is always busy, people are standing, so it's not an unobstructed view.
Ushuaia uses the same kind of speaker configuration that a festival uses, a line array. You won't have any trouble with feeling like you're in the music.
I think you'll be hypnotized by the experience of having space compared to the General Admission crowd, but I suggest you venture out for at least a little bit, because you'll run into a lot of people that are doing the same as you, with less budget, but no less passion. The energy of an enthusiastic crowd can be worth much more than the space or view. Good luck, I hope you have a nice time!