Here are some of my recommendations for you to check out. This list contains titles that are not the biggest best sellers, but titles that I treasure dearly in my collection. Also these are all region free titles.

TMNT
Turtles are back.
Director: Kevin Munroe
Cast: Chris Evans, Sarah Michelle Gellar, Mako, Kevin Smith, Patrick Stewart, Ziyi Zhang, Laurence Fishburne, John Di Maggio
This is the Turtles project I would be proud to show today kids (So of the one's I loved as a child might be bit embarrassing).
CGI works this really well, as it is stylized enough to make it look original. Also visually the Blu-Ray look very good.

Superman: the Movie
the True Superman movie
Director: Richard Donner
Cast: Christopher Reeve, Gene Hackman, Ned Beatty, Margot Kidder and Marlon Brando
Christopher Reeve is the Superman and the Blu-Ray versions of Richard Donner's two Superman movies prove it.
The Blu-Ray upgrade is really worth it for this movie, as print has been marvelously restored and the colors are magnificent. Just look at the white costumes on Krypton, red, blue and yellow on baby Supermans blanket or the green of Kryptonite.

Black Snake Moan
To save his soul he must save hers.
Director: Craig Brewer
Cast: Samuel L. Jackson, Christina Ricci, Justin Timberlake, S. Epatha Merkerson, John Cothran Jr.
One of the best looking Blu-Rays so far, and I don't mind that they are using the visual fidelity to show naked Christina Ricci.
In addition to that this is a good movie, even Timberlake is good in his small role. But this really is a Ricci & Sam Jackson show.

I'm a Cyborg, But That's OK
I wish I could shoot bullets from my fingers
Director: Chan-wook Park
Cast: Su-jeong Lim, Rain
New film from the maker of Oldboy. This time it is a story of Girl who thinks she is a cyborg and is sent to a mental hospital. The movie is a perfect mix of real world and fantasy world that inhabits the minds of the patients.
Visual and the audio on the disc are quite good and there is a nice extra were the director is interviewed by an English audience for an hour.

A Scanner Darkly
Philip K. Dick film that stays close to the books
Director: Richard Linklater
Cast: Keanu Reeves, Robert Downey Jr., Winona Ryder, Rory Cochrane, Woody Harrelson
I am a big fan of Philip K. Dicks work, so I loved the movie. Blade Runner is probably still the best movie based on Dick's books, but this is the one that brings the world and atmosphere of most Dick books to film.
Although rotoscoped (drawn on top of the film), A Scanner Darkly looks really amazing on Blu-Ray, the lines and colors are so clear.
This might not be a movie for everyone but definitely worth a try.

Tears of the Sun
Jungle war in HD
Director: Antoine Fugua
Cast: Bruce Willis, Monica Bellucci, Cole Hauser, Tom Skerritt and Eamonn Walker
Quite overlooked Bruce Willis action movie, even though it is one of the better ones of Willis' film over the last few years. In the movie Willis heads a Special-Ops team whose mission is to extract a western doctor (Bellucci) from Nigeria, which is ravaged by death squads of the government.
Although a BD25 with MPEG2 compression, the movie is visually very good looking and the PCM 5.1 soundtrack packs a punch.

Superman II
the Definite version of Superman II
Director: Richard Donner
Cast: Christopher Reeve, Gene Hackman, Ned Beatty, Margot Kidder and Marlon Brando
This is a far superior version of Superman II than the original 1980 version. Although Donner had to make do with the material that was available (no chance to do re-shoots), I really don't have any problem even with the scene that contains material from the screentests.
Visually of course, you haven't seen a version like this, the image looks good and the colors are amazing.

Gattaca
There Is No Gene For The Human Spirit.
Director: Andrew Niccol
Cast: Ethan Hawke, Uma Thurman, Jude Law, Alan Arkin, Gore Vidal, Ernest Borgnine, Tony Shalhoub, Elias Koteas, Maya Rudolph
Niccol has created a visually stunning vision of chilling future where everything is determined at the moment of ones birth.
Well almost everything, as Gattaca is story of Ethan Hawke's character defying his genetic code to live out his dream.
The Blu-Ray version is very good looking version of the film, with new retrospective documents.