only the i717 LTE is subsidized. I have 2. Wish I had gotten the N7000. You dont need LTE for satisfactory streaming. I'm in a non LTE market and quite happy with data speeds. In fact, with streaming, I'd worry that I'd hit my data cap faster with LTE. like right away. I'm sort of content with HSPA+ in that with all my streaming, I end up at or near my plan's cap. Not sure how I'll manage that with LTE.
Not sure about battery life, it's much better than my SGS2 (after the wifi battery drain bug).