You should be able to get a really good price on the 440QE because the 500 series has just been released that replaces the 400 series. Quite a lot of people will probably be trading theirs in. So, you could always consider a gently used machine. But, don't let the dealer try to make you think the 440QE is more "valuable" because they're discontinued. The price for these should go down and not up, to sell them and get them out of inventory.