dckozak, to answer your original question, try:

Financial Calculators

They've got every type of financial/retirement calculator you can think of. You can plug in expected inflation and investment returns, along with annuity payout numbers.

Everyone above is right though- garbage-in, garage-out applies. Even if you have a true financial expert helping you plug in the right numbers, it's all still just a WAG. Maybe a more informed wag, but still a wag.