Ahh lemme check out my collection real quick-y doo...
Okay, here are some suggestions. And like you, I pretty much only watch my stuff in English. These recommendations have an official seal of quality from me in terms of dubbing.
Gurren Lagann - Want explosions? Want giant robots beating this shit out of each other? WANT BOOBIES??? Then this is your show. No show does over-the-top cheese quite like Gurren Lagann, and the dub really pushes it to maximum levels of cheese without being shit.
FLCL - 6 Episode show that makes no sense whatsoever, but it's probably the best anime I've ever seen. Boy gets hit in the noggin with a bass guitar by an alien woman riding a vespa and then monsters and robots start coming popping out of the spot where she hit him. Makes sense, ya? Well no, it doesn't, but that's what makes it so fun to watch. It's short and has a of re-watch value. And it has one of very anime soundtracks I've ever heard with a very garage band-ish vibe to it. I'd venture to say the soundtrack is as memorable as Bebop's.
Panty & Stocking with Garterbelt - Want a raunchy, dirty, and downright vulgar show? This is it. Panty & Stocking is a show that mocks/parodies american animation and even mimics animation styles that we use (South Park, Ren & Stimpy, classic Transformers). It was meant to be watched in english because all of the text and songs in the show are in English, and all of the cursing is just more real in the dub. The animation is great if you're an art snob like me that likes unique animation, but other than that, great show.
Baccano! - 1930s immortal gangsters set in New York during the prohibition. Every character is the main character and all of the stories intertwine at some point. This is the show that got me back into anime after a long hiatus. Even features authentic mafia accents. Be fore warned: It's a very violent show. It's brother, "Durarara!!" follows the same premise, but instead of being set in the 1930s, it takes place in modern-day Japan with gangs and other mystical creatures. Both are excellent.
Fullmetal Alchemist: Brotherhood - A classic for anime. You've probably already heard the story, but I'm gonna say it anyway! Two brothers are devastated by the loss of the mother, so they try to perform the ultimate taboo -human transmutation- to bring her back. Little did they know that it would backfire and tear their bodies a new one and leave them emotionally and physically scarred for the lives. They now seek out a way to get their original bodies back and unravel and giant, nation-wide conspiracy along the way. Just watch it.
Hope that helped! I have more suggestions if you'd like to hear 'em!