Go to
http://www.fatwallet.com/c/18/
And keep an eye on the Dell deals by checking daily. Over the course of a couple weeks a good deal 20-30% or 200-300 bucks off will come along and then you need to pull the trigger. GET AT LEAST 2 YR warranty - sure it's extra but a lot of the dell stuff is proprietary and built into the motherboard, which if fails, can be $$
MAC - no laptops. But go to the same site and keep an eye on laptop deals, especially on Friday & Sat as often Sundays at a big box store will have something cheap...
As long as you are not gaming this is not a bad deal:
http://www.outpost.com/entry?site=op...06&sku=4996101 though not a great deal either...