Dell's website is basically always the cheapest way to get a new console, as the company frequently offers 15% off coupons that can be applied to console purchases (as well as "computers" or whatever). That discount is always wonderful, but it's particularly exciting right now, what with the launch of the new PS3 Slim. Use coupon code 6FWJ247J1P44CK and your PS3 Slim will cost just $254.
The coupon code also makes for the best Xbox 360 deal yet. A post-price-drop Xbox 360 Pro sells for just $212 on the site. That's almost Arcade-price for a console that you can use! Or if you need an Arcade to replace a busted Pro or something, it's $170. [Via Slickdeals; thanks to everyone who sent this in!]