I'd wait till the end of this month when the bundles are released. Even if you don't want the games in the bundle you could trade them for better, or sell them and get something, or trade them in or something like that. Plus your paying the same price for extra stuff. No point in rushing to get one and not getting extra stuff
Im waiting to get word on the core arcade bundle because ive already got a HD. So for my patience I finally get to play my Halo 3, I get a wireless controller, extra memory(although not that much) and 5 xbla games, AND the HDMI ports there SUPPOSED to be putting into it, and hopefully the nice new quiet 360 with the 65 chipset in it.
So id wait.