There are a wide variety of options. If you want to go to a store to buy, you could check www.bestbuy.com or www.circuitcity.com or whatever your local electronics department store's website is. You often get good deals, I find, by ordering directly from the manufacturer; try www.asus.com or the like for your favorite manufacturer. Nothing rules out the possibility of finding a good deal on www.Amazon.com or www.ebay.com, though.