IMHO, it would be a mistake to pass the NRST without repealing the 16th Amendment. If we don't, I guarantee you that federal withholding will return -- probably during a democrat regime -- and then we'll have both. Until then, better the devil you know than the devil you don't.
Also, it isn't just homeowners who will look dimly upon a sales tax. Think of the millions of people who are employed in the huge tax INDUSTRY. Accountants, tax lawyers, H&R Block and the TurboTax folks . . . and the list goes on. All these folks will be out of work.