I just finished the series and I have to say...I LOVE IT!! I don't know if anyone here has seen it but I personally think it's amazing. Normally I don't like Mecha-anime but this is an exception because of how good it is. I advise you to give it a view (P.S English voices are very good). If you want a plot summary I can't without spoiling some stuff. :/

The dubbed can be viewed here (all episodes) : http://www.justanimedubbed.tv/gurren-lagann-episode-1/