Hi ggtygug. Since you've posted in the forum dedicated to discussions about players that play both
formats (this is not
a "Blu-ray vs. HD DVD" forum) you'll of course likely encounter people who think that owning players for both formats is best.
Blasst gave good advice. Keep in mind that while some studios release films in both formats, several studios only release their movies either in one format or the other- not both. If you can only buy a player for one format, be sure to research the films that you want to watch and make sure that they'll be available for the player that you decide buy.