are you fucking serious???? 3-4k? those goddamned commericals always say that they're about the same goddamned price as a conventional matress.... 10X AS MUCH MONEY AND ABOUT THE SAME PRICE ARE WAY DIFFRENT!....

as for your question, unless you're rich, i dont' see any way, at all of justifying that much money for a mattress.... when you're mattress payments equal your car payments in length and ammount of money to a payment, you're spending way too much to sleep on... lol..