Nice review.
BTW, My brother bought S3 a week ago and so i get a chance to use it for that weekend. So here's my short review on that, with my 2 days of complete, rough usage. I also used HTC One X for a week, which i borrowed from my colleague.
Build : HTC One X wins, without any doubt here. I don't like the same plasticy feel for a 37k phone. And the back cover was easily prone to scratches. He has to buy an Case for that, to make the surface scratch-free.
Package - Seriously, no cable for TV Viewing. I mean for 37k, they gave us some Sagar hotel dosa, but what we expected is an Start hotel dosa. Shitty package, and same as my I9003. WTF!!!
Screen - One word, Awesome! I love it and especially for games and movies.
UI - Same shitty, yet bit improved Samsung UI. Told my bro to update it, but he refused as he is very scared of installing new one.
Camera - Good. But you cannot declare it as excellent. Although, ability to take pictures while recording video is nice inclusion.
Browsing - Big screen, crispy and clear text make browsing a breeze.
Battery - Even with such medium-hard usage, it lasted for a day, which is more that good for me.
Sound - Good, but the loudspeaker is a bit crampy and not clear.
Calling - Good.
Overall : 4/5
Still i feel like, my brothers been ripped off. I advised him to go with HTC One X, but he is coherent in choosing S3, for no reason. And if i get a chance to buy one, i'd definitely go with One X.