I'm sure it will depend on how it works out.You and I are both FairTax fans. But I must disagree with you on the state sales tax. It will not be included in the 23% federal tax. If a state has a sales tax, it will still be added separately from the federal sales tax.
23% is the highest sales tax I have heard of and from what I understood both were included.
Either way, even if it is close to 30% it would still be worth it to be rid of:
Social Security Tax
Capital Gains Tax
And on and on and on and on down the list.......