OK, that helps.
Anything else? Does it really matter if I get the 720 or 1080?
Just a few things for you to ponder:
If you go with an LCD, make sure that you get the 120Hz refresh rate. The plasma screens normally have a 480Hz rate which is better for watching sporting events, but the LCD with 120Hz is good as well.
Blu-Ray is the only thing that you will currently see in 1080p, but the satellite companies are quickly trying to move in that direction. Cable would be further behind them IMO.
LCD screens work better in brighter rooms, and Plasma works better in darker ones in general.