My musical list:

All Shook Up, American Idiot, Annie Get Your Gun, Assassins, Avenue Q, Billy Elliot, Blood Brothers, The Book of Mormon, Cabaret, Catch Me If You Can, Chicago, A Chorus Line, Commentary! The Musical, Curtains, Dr. Horrible's Sing-Along Blog, Dreamgirls, The Drowsy Chaperone, Footloose, Frankenstein, Grease, Guys and Dolls, Gypsy, Hairspray (Broadway only), How to Succeed in Business Without Really Trying, In The Heights, Into The Woods, Jersey Boys, Jesus Christ Superstar, Legally Blonde, Les Miserables, Little Shop of Horrors, Little Women, Memphis, Monty Python's Spamalot, NEWSical, Next to Normal, Nine, Oklahoma!, Oliver!, Ordinary Days, The Producers, Rent (Broadway + Movie), Rock of Ages, The Rocky Horror Picture Show, Seussical the Musical, Shrek the Musical, Spring Awakening, Thoroughly Modern Millie, [title of show], Urinetown, A Very Potter Musical (& Sequel), We Will Rock You, West Side Story, Wicked, You're A Good Man Charlie Brown, Young Frankenstein, 13, 25th Annual Putnam County Spelling Bee

...

So what musical should I buy next?