I thought Watchmen, 300, Dark Knight, Top Gun, Hellboy 1&2, Transformers, Ghost Rider were sweet
I was VERY let down by Stargate, AvP, didn't look stunning visually at all
Supposedly one of the best sounding Blu-Rays is Black Hawk Down if you have a good surround sound system
http://www.blu-ray.com/
I like this site, it reviews movies based on video effects, sound effects, quality of movie, HD experience, etc.