First of all, do you have an HDTV?
Bluray has had different profiles. 2.0 is the latest version. Here is a break down of the profiles:
Profile 1.0 is the original hardware requirement for Blu-ray players and essentially meets the bare minimum for playing back Blu-ray Discs.
Profile 1.1 brings the addition of
picture-in-picture functionality, also known as
BonusView. Typically, Blu-ray movies use this feature to enable a small window of video commentary, where a director or actor talks about a scene while it happens in the background.
Profile 2.0, also known as
BD-Live, requires your player to access the internet for certain features like movie trailers, Internet chats, scheduled chats with the director, Internet games, downloadable featurettes, and downloadable quizzes.
The best player out there is still the PS3. It is basically future proof, because it gets FW updates regularly. It has all of the HD audio options and it is up to date with Profile 2.0. It just went down in price to $299.99. It is also one of the best DVD upscalers as well, in case you don't have an HDTV or don't want to rebuy some movies you already have on DVD.
Some Blu-Ray movies do have special features that DVD's do not thanks to Profile 1.1 and 2.0. Every movie is different and some do not utilize the profile options.
I use this site regularly.
High-Def Digest HD DVD & Blu-ray News and Reviews in High Definition. The reviews are usually on the money and they let you know all the options the movie has over DVD.
Let me know if you have any other questions.