The BestBuys I have been to have tons of these MW2 elite bundles and tax can add up to $40 or more. At BB, you can also see if in stock or ship it to the store. I would go with Newegg because of tax and free 2-day guaranteed UPS shipping (mine was anyways).
However, my MW2 console hard drive enclosure uses much more plastic than previous elite and premium HDs. But the disc drive seems to be quieter and the 250GB HD seems faster.