I am going to the Galapagos in the middle of March and I am looking into getting the Canon 20d, I currently have a 300d. However, I have heard several rumors of an update at the end of this month, but it would not be availible to april. I am leaving on the March tenth. Should I go ahead and buy it now? Would there be a large discount on the 20d immediately after the announcement of the upgrade to the 20d at the PMA? Or would I have to wait till April when the new cameras are in store for that discount to come in to affect?