Might as well wait two weeks. Ivy Bridge is expected to come out before the end of the month. If no new systems are available/attractive at that point, you'll still have a couple weeks to buy a Sandy Bridge model and prices might drop a little as companies flush their older stock. Assuming you buy a notebook with a low-res panel, you might even be able to scrape by with Ivy Bridge's integrated graphics for Team Fortress 2 and Diablo 3.
