Hmmm, as naya_lulu said, it is a good idea, but, Americans tend to annoy me fairly quickly, even though a huge chunk of my family are yanks- but these type of hyper-happy, wannabe mtv brats just tend to make me feel very British and sarcastic.
As for the Haruhi dub, well, dub is a swear word in my anime eyes.(ears?) A couple of the Ghibli movies have been quite enjoyable to me as dubs, but subs will always be better imho.