Never saw any of them sadly. I was gonna see meet the spartans, but some friends told me it was balls.
I'll try to get Epic Movie rented for my birthday.
I'd recommend against renting any of them. I've only seen date movie and even in 8th grade or whenever it came out I thought it was a piece of shit (and I liked Scary Movie 2 back then).
Here are some quotes from rotten tomatoes to help you guys choose:
Date Movie - 6% - "Memo to would-be parodists: referencing other movies is not the same as satirizing them. Once upon a time, when giants like Airplane! and Top Secret roamed the earth, filmmakers trafficking in the fine art of the spoof would bring a madcap energy to the proceedings; now, simply trotting out a guy in a 'don't vote for Pedro' t-shirt is supposed to leave audiences in stitches."
Epic Movie - 2% - "A crude comedy with nothing new or insightful to say about the subjects it satirizes."
Meet the Spartans - 2% - "A tired, unfunny, offensive waste of time, Meet the Spartans scrapes the bottom of the cinematic barrel."
Disaster Movie - 2% - "Returning to their seemingly bottomless well of flatulence humor, racial stereotypes, and stale pop culture gags, Friedberg and Seltzer have produced what is arguably their worst Movie yet."