So along with the rumored price drop, which isn't much of a rumor anymore, there also seems to be a HD upgrade in store for the Premium pack. The rumored model upgrade is said to be announced during E3. I would not be surprised at all if this was true. In fact, after hearing the rumor, I would be surprised if this didn't come true.
So basically if anyone has been waiting to get a 360, or become a part of next-gen(now current-gen), then this would seem to be the opportune time to buy.