If you’ve been putting off buying a Blu-Ray player until you have a really good excuse, this week might be the time to do it. Iron Man, what many people are calling one of the best films of the year so far, is out on DVD, and seeing it in ultra-high def is an experience no movie lover should miss. Plus, you’ll want to have your home entertainment system set up and ready for when The Dark Knight is released in a couple of months. The following is a list of the worthy and unworthy releases this week.

Buy It: Iron Man -- Robert Downey, Jr., described as “magnetic” in the title role, plays wealthy and brilliant weapons industrialist Tony Stark, who designs himself a state of the art steel suit and sends himself smashing and soaring, fighting bad guys across the globe. The rock solid supporting cast includes Gwyneth Paltrow as his ever-faithful assistant, Terrence Howard as his military advisor and best friend, and Jeff Bridges as his company colleague. Don't forget to look for director John Favreau darting in and out. Rated PG-13

Rent It: Forgetting Sarah Marshall -- From uber-comedy producer Judd Apatow, this film is about a doughy schlub (Jason Segal of Freaks and Geeks fame) who goes to a Hawaiian resort to forget his ex-girlfriend (Kristen Bell of Veronica Mars and Heroes fame) and discovers she's staying there as well--with her new, British rock star boyfriend (Russell Brand, only of British television fame...until now). The naughty hilarity begins in the first five minutes, when Segel, fresh out of the shower, shows his vulnerability and his manhood -- every, single detail, by refusing to put on his pants while his girlfriend of five years breaks up with him. And the laughs never let up, through the entire film. It’s rated R, of course, so it’s not one for the kiddies, but it’s a perfect date night rental for adults.

Skip It: Taxi to the Dark Side --It’s not that this isn’t an excellent documentary. As a matter of fact, it received an Oscar. It’s just that the film is so darn depressing, only the most socially and politically conscious will be able to derive the benefit of watching it. Inspired by the post 9/11 war, director Alex Gibney investigates the torture and killing of an innocent Afghani taxi driver, instigating a probe into reckless abuses of government power. The film does incorporate rare and never-before-seen images from inside the Bagram Air Force Base in Afghanistan and Abu Ghraib and Guantanamo Bay prisons—not exactly a feel good film, but powerful and haunting none-the-less. It got a well-deserved R rating for disturbing image and violence. It’s also showing on HBO right now, so if you want to watch it or record it there, it’s available.

Rent it: Bigger, Stronger, Faster* --Producers of this bouncy documentary have high hopes for its Academy Award possibilities this year.  It’s all about juicing of a steroidal nature. The Bell brothers became body builders and used steroids themselves, and this documentary not only tells their story, but filmmaker Chris Bell explored the health costs of juicing and the moral consequences involved in the use of performance-enhancing substances. He speaks with doctors, lawyers, congressmen, gym rats, and professional athletes, like Olympic sprinters Ben Johnson and Carl Lewis and Tour de France cyclist Floyd Landis. He also includes footage of José Canseco, Barry Bonds, and Mark McGwire testifying during the federal grand jury and congressional hearings on steroid use in the major leagues. The film is recommended for athletes, sports fans, health nuts, and even pop culture junkies.