You know what? I just bought an M9 from ebay recently, since citymusic doesn't have stock at that time. I saved about $100 in all. For me, that's quite a big saving.
Make use of the free shipping within US and get ebenex to ship over the item for you. You can save quite abit on the shipping.
Also ask the seller if he can remove the adapter and give u discount since you have no use for it. I believe most will be willing to do that since they can put it up for sale at a higher price.
Warranty wise, the seller promise to exchange with me a new set within a month if anything goes wrong. So far everything's been good.
Of course, if you do not want to deal with all the communications, waiting time and the hassles if the stuff is faulty, you can just get it straight from citymusic.