War Of The Worlds (2005) (2 Discs) DTS version for £3.99 can't be bad, plus loads of Special Features.
'Revisiting The Invasion': Spielberg and Cruise recount their on-set experiences and reveal their approach to telling the personal story at the heart of this epic odyssey
'The H.G. Wells Legacy': screenwriter David Koepp explores the legacy of H.G. Wells' classic novel from its initial conception through its various adaptations
'Steven Spielberg And The Original War Of The Worlds': the stars of the original 1953 film (who make cameos in this version), Gene Barry and Ann Robinson, share their experiences -- past and present
'Characters - The Family Unit': Spielberg and Cruise discuss the emotional core of the film
'Pre-Visualisation': a rare look at Spielberg in pre-production as he designs the film's action sequences on computer
'Production Diaries - East Coast': the cast and crew on a whirlwind shooting tour of the Eastern Seaboard
'Production Diaries - West Coast': the cast and crew are back on the West Coast for more action filming on dozens of practical locations, as well as six stages spread over three studio lots
'Designing The Enemy - Tripods And Aliens': Spielberg and his collaborators discuss the ground-breaking design of his aliens, their machines, and the challenges in bringing H.G. Wells' vision to life
'Scoring War Of The Worlds': Spielberg and John Williams discuss the score to the film, their 21st collaboration!
'We Are Not Alone': Spielberg and his stellar cast and crew offer their closing thoughts about the experience of making War Of The Worlds
Next best I can find is £4.89 at SendIt.com