In no particular order:

Sullivan's Travels (1941) Dir: Preston Sturges 
Arrow Video

Solid transfer of a comedy classic from Arrow, with a good selection of extras

Salvatore Guiliano (1962) Dir. Francesco Rosi
Arrow Video

Wonderful transfer, with some interesting supplements investigating Guiliano's life, both in actuality and in myth

The Cabinet Of Dr. Caligari (1920) Dir. Robert Wiene Masters Of Cinema

Caligari finally arrived on blu-ray in 2014, in a lovely restoration

Chaplin's Mutual Comedies (1916-1917)
Flicker Alley

Great collection of all Chaplin's work at Mutual

Twin Peaks (1990-1992) - Paramount

Beautifully packaged, with a wealth of extras

Il Sorpasso (1962) Dir. Dino Risi 
Criterion Collection

I hadn't heard of this film before the Criterion release but it was a wonderful discovery. Great transfer with copious supplements. 

Melancholia - Plain Archive exclusive 001 (2011)
Dir. Lars Von Trier - Plain Archive

From South Korea, Plain Archive released this stunning box of one of my favourite films

Breaking The Waves (1996) Dir. Lars Von Trier 
Criterion Collection

Approved by Von Trier, this should be the definitive release of the film. Criterion returned to the original negative for a 4K transfer, avoiding the video processing that Trier employed for aesthetic purposes on the film's original release.

Persona (1966) Dir. Ingmar Bergman
Criterion Collection

Bergman can be hit and miss with me but this is an undoubted masterpiece, in a great package from Criterion.

Hard Day's Night (1964) Dir. Richard Lester 
Criterion Collection

Dream edition of the film for Beatles fans. 4K transfer approved by Dick Lester