720p vs a 1080p does not matter if you don't have a TV that is 50 inches or more
but if you could get the full HD (1080p) for a price just a bit higher than a HD (720p), then why not go full HD?
Your eyes will never see the difference anyway unless you are 1)Owl or 2)Superman.
To me what is important are:
1. Decent contrast ratio, anywhere north of 10,000:1 (nakalimutan ko term pero nde sya dynamic)
2. Wattage
3. Price