720p vs 1080p

Is there that much a noticable difference in a 720p HDTV vs. a 1080p?
I sure like the price difference, but, should I spend the 300-400 more for the 1080p, or is it worth it?
Depends on how big the screen is and what your sources are. The bigger the screen, the more noticeable. A reasonable cutoff size is about 50" ... bigger, and you'll notice the 1080p more. Smaller you won't notice it as much, especially at viewing distance.
If you watch a lot of std. def. broadcasts and/or std. DVDs, the diff. won't be as great either. If you have 1080p sources like BluRay discs, you'll see more difference.
720p vs 1080i HD Explained