Brokeback Mountain 
Just a few words to convince you to purchase this film. It's fantastically shot. The acting is blinding - Heath Ledger in particular gives one of the most moving, detailed performances you're likely to see this or any other year - and Lee directs with insight, sensitivity and a precise feel for the emotional undertow that makes this film great. This is a love story, that it's between 2 men is incidental to the themes of selfish passion and lost lives. It's also a simple story, but the best ones always are. This film is a classic, give it a chance and allow it to take hold.
An incredible performance by Heath Ledger, RIP. Such a beautiful, moving work.