I downloaded the user manual for the A500. It was halfway decent but I already knew most of what it included having used the A100 for awhile as well.
It is all a learning process. I don't have much fun initially cause I put a device through its paces prior to the return policy time limit for the things that I want to use it for.
It's lots to go through but I think I'll do so as it probably will be worthwhile:
http://forum.xda-developers.com/forumdisplay.php?f=1133
Also, try to view some HD trailers on IMDB.com. It will give one a feel for the picture quality on the device and how well your wi-fi can handle the feed hopefully without constant buffering. Make sure you view in 720 HD resolution and click appropriately on that choice.
And Netflix has some streams listings for movies in HD as well. Try "No Strings Attached".